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Storm Agnes to bring winds and rain
Storm Agnes has been named by the Met Office as the deep area of low-pressure that will impact much of the UK on Wednesday and into Thursday.
Read morePortstewart (County Londonderry) weather
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Forecast days
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Today. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius. Thunder changing to light showers by nighttime. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; No pollen data. Tide: Next high at .Today. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 9 degrees Celsius. Thunder changing to light showers by nighttime. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; No pollen data. Tide: Next high at .
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Wednesday 27 September. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 12 degrees Celsius. Cloudy changing to heavy rain by lunchtime. Sunrise: ; Sunset: . UV: Low; Pollution: Low; No pollen data. Tide: First high at .Wednesday 27 September. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 12 degrees Celsius. Cloudy changing to heavy rain by lunchtime. Sunrise: ; Sunset: . UV: Low; Pollution: Low; No pollen data. Tide: First high at .
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Thursday 28 September. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Partly cloudy changing to sunny intervals by late morning. Sunrise: ; Sunset: . UV: Low; Pollution: Low; No pollen data. Tide: First high at .Thursday 28 September. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Partly cloudy changing to sunny intervals by late morning. Sunrise: ; Sunset: . UV: Low; Pollution: Low; No pollen data. Tide: First high at .
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Friday 29 September. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Clear. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; No pollen data. Tide: First high at .Friday 29 September. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 8 degrees Celsius. Clear. Sunrise: ; Sunset: . UV: Moderate; Pollution: Low; No pollen data. Tide: First high at .
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Saturday 30 September. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 12 degrees Celsius. Cloudy changing to light rain by early evening. Sunrise: ; Sunset: . UV: Low; Pollution: Low; No pollen data. Tide: First high at .Saturday 30 September. Maximum daytime temperature: 15 degrees Celsius; Minimum nighttime temperature: 12 degrees Celsius. Cloudy changing to light rain by early evening. Sunrise: ; Sunset: . UV: Low; Pollution: Low; No pollen data. Tide: First high at .
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Sunday 1 October. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Partly cloudy changing to sunny intervals by late morning. Sunrise: ; Sunset: . UV: Low; Tide: First high at .Sunday 1 October. Maximum daytime temperature: 16 degrees Celsius; Minimum nighttime temperature: 11 degrees Celsius. Partly cloudy changing to sunny intervals by late morning. Sunrise: ; Sunset: . UV: Low; Tide: First high at .
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Monday 2 October. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 10 degrees Celsius. Partly cloudy changing to sunny intervals by late morning. Sunrise: ; Sunset: . UV: Low; Tide: First high at .Monday 2 October. Maximum daytime temperature: 14 degrees Celsius; Minimum nighttime temperature: 10 degrees Celsius. Partly cloudy changing to sunny intervals by late morning. Sunrise: ; Sunset: . UV: Low; Tide: First high at .
Seven day forecast for Portstewart
| Time | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | 20:00 | 21:00 | 22:00 | 23:00 |
|---|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
|
60% | 60% | 60% | 50% | <5% | 30% | 10% | 40% | <5% |
|
|
16°
|
15°
|
15°
|
14°
|
13°
|
13°
|
12°
|
12°
|
11°
|
|
|
14° | 13° | 13° | 12° | 12° | 11° | 10° | 9° | 9° |
|
|
SW
14
|
WSW
11
|
WSW
13
|
SW
10
|
SSW
10
|
SSW
10
|
SSW
11
|
SSW
12
|
SSW
11
|
|
|
20 | 18 | 18 | 15 | 16 | 17 | 19 | 21 | 18 |
|
|
VG | E | E | E | E | VG | E | VG | E |
|
Humidity
|
71% | 76% | 71% | 76% | 78% | 81% | 83% | 85% | 84% |
|
UV
|
2 | 2 | 1 | 1 | 1 | - | - | - | - |
| Time | 00:00 | 01:00 | 02:00 | 03:00 | 04:00 | 05:00 | 06:00 | 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | 20:00 | 21:00 | 22:00 | 23:00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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|
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Chance of precipitation
|
<5% | <5% | <5% | <5% | <5% | <5% | <5% | 10% | 10% | 10% | 10% | 20% | 90% | 90% | ≥95% | ≥95% | ≥95% | 90% | 90% | 90% | 90% | 50% | 40% | 50% |
|
|
11°
|
10°
|
10°
|
10°
|
9°
|
9°
|
9°
|
10°
|
10°
|
12°
|
13°
|
14°
|
14°
|
14°
|
14°
|
15°
|
15°
|
15°
|
15°
|
14°
|
15°
|
15°
|
15°
|
14°
|
|
|
9° | 8° | 8° | 7° | 6° | 6° | 7° | 7° | 8° | 9° | 10° | 11° | 10° | 10° | 10° | 10° | 10° | 10° | 10° | 10° | 11° | 11° | 11° | 10° |
|
|
S
10
|
S
11
|
S
11
|
S
10
|
SSE
11
|
SSE
12
|
SSE
12
|
SSE
12
|
SE
11
|
SE
14
|
SE
16
|
SE
18
|
SE
21
|
ESE
22
|
SE
25
|
SE
25
|
SE
26
|
SE
27
|
SE
25
|
SE
24
|
S
23
|
SSW
23
|
SW
21
|
WSW
25
|
|
|
16 | 17 | 18 | 19 | 18 | 22 | 21 | 22 | 21 | 26 | 29 | 32 | 37 | 38 | 43 | 44 | 45 | 45 | 42 | 40 | 38 | 37 | 34 | 40 |
|
|
E | VG | VG | VG | VG | VG | G | G | VG | G | G | G | M | M | M | M | M | G | G | M | M | VG | VG | G |
|
Humidity
|
84% | 87% | 89% | 91% | 94% | 94% | 95% | 95% | 91% | 88% | 86% | 85% | 87% | 88% | 88% | 89% | 87% | 85% | 87% | 90% | 89% | 88% | 88% | 89% |
|
UV
|
- | - | - | - | - | - | - | - | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | - | - | - | - |
| Time | 00:00 | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
|
10% | 10% | <5% | <5% | 10% | 40% | 40% | 10% | <5% |
|
|
14°
|
14°
|
13°
|
12°
|
13°
|
15°
|
15°
|
14°
|
13°
|
|
|
9° | 9° | 9° | 9° | 10° | 11° | 12° | 11° | 10° |
|
|
WSW
29
|
WSW
30
|
WSW
24
|
SSW
16
|
S
18
|
S
22
|
SSW
19
|
SW
16
|
SW
16
|
|
|
46 | 48 | 38 | 26 | 31 | 38 | 35 | 29 | 28 |
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E | E | VG | VG | VG | G | G | VG | VG |
|
Humidity
|
86% | 84% | 81% | 83% | 78% | 73% | 76% | 77% | 81% |
|
UV
|
- | - | - | - | 1 | 2 | 1 | 1 | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
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Chance of precipitation
|
<5% | <5% | <5% | <5% | 10% | 10% | <5% | <5% |
|
|
12°
|
12°
|
11°
|
13°
|
15°
|
15°
|
13°
|
11°
|
|
|
9° | 9° | 9° | 10° | 12° | 12° | 11° | 9° |
|
|
SW
16
|
SW
15
|
SW
14
|
WSW
15
|
WSW
16
|
W
14
|
WSW
9
|
SW
7
|
|
|
28 | 26 | 25 | 27 | 29 | 25 | 16 | 13 |
|
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VG | VG | G | VG | VG | VG | VG | VG |
|
Humidity
|
83% | 83% | 85% | 78% | 68% | 66% | 78% | 87% |
|
UV
|
- | - | - | 1 | 3 | 1 | - | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
|
Chance of precipitation
|
<5% | <5% | 10% | 10% | 10% | 30% | 50% | 20% |
|
|
10°
|
10°
|
9°
|
12°
|
14°
|
15°
|
14°
|
14°
|
|
|
9° | 8° | 8° | 10° | 12° | 12° | 11° | 11° |
|
|
SSW
6
|
S
6
|
SSE
7
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SSE
9
|
SSE
13
|
SSE
14
|
SSE
15
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SSW
15
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|
11 | 11 | 12 | 17 | 26 | 26 | 28 | 28 |
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VG | VG | G | VG | G | G | G | G |
|
Humidity
|
90% | 91% | 91% | 87% | 77% | 80% | 85% | 88% |
|
UV
|
- | - | - | 1 | 2 | 1 | - | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
|
Chance of precipitation
|
10% | 10% | 10% | 10% | 10% | 30% | 10% | 10% |
|
|
14°
|
13°
|
12°
|
14°
|
16°
|
16°
|
14°
|
12°
|
|
|
11° | 10° | 10° | 11° | 13° | 13° | 11° | 10° |
|
|
SSW
15
|
SSW
13
|
SSW
13
|
SSW
15
|
SW
16
|
SW
16
|
SW
13
|
SW
14
|
|
|
27 | 24 | 23 | 28 | 31 | 30 | 24 | 25 |
|
|
VG | VG | VG | G | VG | G | VG | VG |
|
Humidity
|
88% | 88% | 89% | 84% | 72% | 69% | 78% | 82% |
|
UV
|
- | - | - | 1 | 2 | 1 | - | - |
| Time | 01:00 | 04:00 | 07:00 | 10:00 | 13:00 | 16:00 | 19:00 | 22:00 |
|---|---|---|---|---|---|---|---|---|
| Weather symbol |
|
|
|
|
|
|
|
|
|
Chance of precipitation
|
<5% | <5% | <5% | 10% | 10% | 30% | 30% | 30% |
|
|
12°
|
11°
|
11°
|
12°
|
14°
|
13°
|
12°
|
11°
|
|
|
9° | 9° | 8° | 9° | 11° | 10° | 9° | 8° |
|
|
SW
14
|
SW
14
|
SW
15
|
SW
16
|
WSW
17
|
WSW
16
|
WSW
15
|
WSW
14
|
|
|
26 | 26 | 27 | 30 | 33 | 31 | 27 | 26 |
|
|
VG | VG | VG | G | G | VG | VG | VG |
|
Humidity
|
84% | 85% | 85% | 78% | 70% | 72% | 77% | 80% |
|
UV
|
- | - | - | 1 | 2 | 1 | - | - |
Chance of precipitation represents how likely it is that rain (or other types of precipitation, such as sleet, snow, hail and drizzle) will fall from the sky at a certain time.
This number shows the air temperature for the time period. You can see the temperature in Celsius or Fahrenheit by using the dropdown menu.
Feels like temperature considers other factors, such as wind speed and humidity. This gives you a better idea of how the temperature will actually feel at the time.
Wind gust shows the highest wind speed that you should encounter at that time, as winds peak and lull.
Strong winds are shown in bold for speeds of 29 mph or more.
The arrow shows the direction the wind is blowing. The letters show the direction the wind is blowing from (on a standard 16-point compass).
The number represents the average wind speed expected at that time.
The arrow shows the direction of the wind (up is north). If the arrow points from land to sea, the wind will be blowing out to sea (‘offshore’). The number is the average wind speed.
Beware of offshore winds if you are using inflatables, paddle boards or kayaks. These winds can blow you out to sea. Read more about how wind will affect you at the beach.
Visibility measures the distance at which an object can be clearly seen.
| VP (Very Poor) | Less than 1 km |
| P (Poor) | 1.1 km to 4 km |
| M (Moderate) | 4.1 km to 10 km |
| G (Good) | 10.1 km to 20 km |
| VG (Very Good) | 20.1 km to 40 km |
| E (Excellent) | Greater than 40 km |
Humidity is the amount of water vapor in the air. If there is a lot of water vapour, the humidity will be high. The higher the percentage of humidity, the wetter it will feel outside.
UV exposure index and the protection required to help keep you safe:
No risk of UV - It’s safe to stay outside. Low - You can safely stay outside. Consider sunscreen in direct sunlight. Moderate - Take care during midday hours and do not spend too much time in the sun unprotected. Sunscreen advised. High - Seek shade during midday hours, cover up and wear sunscreen. Very high - Spend time in the shade between 11am and 3pm. Shirt, sunscreen and hat are essential. Extreme - Avoid being outside during midday hours. Shirt, sunscreen and hat essential.
This is the average height of the waves, 1-2 miles out to sea. The height of the waves can vary. The individual waves out to sea or at the beach can be higher than this number. If you are close to the water, keep an eye on the waves to stop you or your belongings being swept away.
Read more about calculating the expected height of the waves at the beach.
This is the average number of seconds between one wave and the next, 1-2 miles out to sea. A long wave period (more than 10 seconds) means the waves at the beach may be more powerful. Lifeguards can give you advice on waves if you’re planning to go into the water.
Read more about the period of waves.
The arrow shows the average direction of the waves 1-2 miles out to sea. It indicates how sheltered the beach will be from these waves. If the arrow points towards land, most of the waves’ power will reach the beach. If the arrow is parallel to or pointing away from land, the wave height is likely to be lower on the beach than it is offshore.
Lifeguards can give you advice on waves if you’re planning to go into the water.
Portstewart weather map
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Northern Ireland weather forecast
Headline:
Heavy rain this morning, brighter with scattered showers this afternoon.
Today:
A band of heavy rain will cross from the west this morning, the odd rumble of thunder possible. Brighter conditions with a scattering of showers will follow for the afternoon. Breezy, strong coastal winds at first. Maximum temperature 16 °C.
Tonight:
A few showers around this evening, but becoming dry with clearing skies. Wind will ease leading to a few mist and fog patches by dawn. Minimum temperature 5 °C.
Wednesday:
A dry and bright start. However, it will turn wet and very windy during the day, strong to gale force southeasterly winds developing, severe gales around the Irish Sea coast. Maximum temperature 15 °C.
Outlook for Thursday to Saturday:
Early gales on Thursday, then a lot of dry and bright weather with winds slowly easing, then showers later. Mainly dry on Friday and Saturday with sunny spells.
Updated:
UK long range weather forecast
A changeable pattern is likely through this period, with perhaps a fairly settled start across most parts of the UK, excluding northern areas, where showers are likely to continue, especially in the northwest. As the period progresses, a northwest-southeast split is likely to develop, with perhaps prolonged spells of rainfall and windy conditions arriving to the west and northwest, while an overall dry theme is possible in the east and southeast. Any prolonged settled conditions are likely to deteriorate later into the period, general conditions becoming more changeable with a mixture of rain, showers and some strong winds, interspersed with some drier interludes. Temperatures are expected to be close to or slightly above average through the period, with some cold nights.
Updated:
A mixture of spells of rain and showers, along with some more dry, settled periods, are likely until the middle of the month, the latter perhaps slightly favoured. However, there could be a trend towards more frequent unsettled conditions as the month continues, which could lead to southern areas being wetter than average for the time of year. Northern areas may see slightly less rainfall than usual though. It is expected that temperatures will generally be above average for October, but, during clearer spells in particular, some nights may feel chilly.
Updated:
Nearest forecasts
- Portrush (Beach) 2.6 miles
- Portrush - Mill (West) Strand (Beach) 2.8 miles
- Portrush 2.9 miles
- Portrush (Coleraine) 2.9 miles
- Portstewart (The Strand)(Beach) 3.0 miles
- Guy L. Wilson Daffodil Garden 3.3 miles
- Hezlett House (NT) 3.4 miles
- Coleraine 3.6 miles
- Royal Portrush Golf Club 3.8 miles
- Magilligan Strand, Benone (Beach) 4.1 miles
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