Harlech Castle (Gwynedd) weather

Headline:

Occasional sunny spells, but turning cloudy with patchy rain later.

Today:

Widespread low cloud brings a rather murky start to the day, with mist and hill fog clinging across higher ground. Turning brighter and breezier this afternoon, before patchy rain begins to spread across the south by this evening. Maximum temperature 17 °C.

Tonight:

Rain turns persistent and heavy overnight, with widespread low cloud returning to the country. Remaining rather breezy too, particularly along the coasts, but milder than recent nights. Minimum temperature 14 °C.

Wednesday:

Breezy at first, but winds soon turn light, causing showers to become slow-moving and rather persistent across the country. These showers heavy at times, leading to a rather wet day. Maximum temperature 18 °C.

Outlook for Thursday to Saturday:

More settled on Thursday with sunny spells and patchy rain in the southwest. Cloudier and windier from Friday, with rain arriving from the west, bringing further heavy showers on Saturday.

This period is likely to start changeable and often unsettled but relatively mild, with rain or showers for most places. There is potential for a deep area of low pressure to develop to the west or northwest of the UK early in this period, bringing a spell of very strong winds and heavy rain, especially to parts of the west and north. Towards the latter part of October, there are signs that whilst northwestern areas may continue to feel the influence of areas of low pressure, further south pressure is expected to build, bringing more in the way of fine, settled conditions. With this comes an increasing chance of overnight frost and fog, with the latter perhaps persisting well into the day in some areas.

High pressure is likely to steadily become more influential around the turn of the month. This means plenty of dry weather to be had, but with the chance of overnight frost and fog becoming rather more widespread than in the days preceding this period. Some large fluctuations between daytime and nighttime temperatures are possible, with relatively mild days, where fog doesn't linger, and cold frosty nights. Towards mid-November, the area of high pressure may track towards the northwest, allowing a gradual trend towards colder and perhaps more unsettled conditions.