14 day weather forecast

Swansea weather August 2026 — 14 day forecast · United Kingdom

19°

cloudy · feels like 19°

Updated at
  • Live from Open-Meteo
  • Refreshed several times a day
  • 14 days ahead
  • No tracking · free
Warmest day
Wednesday 9 Sept
21°C
highest maximum
Wettest day
Monday 7 Sept
44.2 mm
43% chance
Most sunshine
Tuesday 1 Sept
12.9 hours
of sunshine
Trend
14 days
Unsettled
11 days with rain

The next 14 days

swipe →
Avg max, 3 days
19.7°C
Coldest night
10°C
Most sunshine
12.9 h
Wind from
the west

Overview table · August 2026

Swansea 14 day forecast, day by day

The table below shows the full 14 day weather forecast for Swansea (United Kingdom): the maximum and minimum temperature, rainfall in millimetres, the chance of rain, humidity, hours of sunshine and the UV index per day. Across the next two weeks the maximum temperature in Swansea averages around 19°C and the minimum around 14°C, with roughly 158 mm of rain in total, 2 dry days and about 100 hours of sunshine.

Last updated:

14 day weather forecast for Swansea (United Kingdom) per day: temperature, rainfall, chance of rain, humidity, sunshine hours and UV index. Updated in August 2026.
DayWeatherMaxMinRainChanceHumiditySunUV
Saturday29 AugShowers20°C16°C15 mm100%88%1.9 h4moderate
Sunday30 AugShowers20°C16°C9 mm100%83%3.1 h4moderate
Monday31 AugLight rain19°C14°C0.8 mm97%75%6 h3moderate
Tuesday1 SeptLight rain18°C14°C9 mm86%86%12.9 h5moderate
Wednesday2 SeptShowers18°C10°C16.1 mm94%92%0.2 h1low
Thursday3 SeptLight rain19°C17°C7.4 mm66%94%12.7 h5moderate
Friday4 SeptLight rain18°C16°C0.9 mm85%84%5.1 h4moderate
Saturday5 SeptLight rain17°C13°C10.9 mm53%89%7.2 h2low
Sunday6 SeptLight rain19°C11°C1 mm39%80%12.8 h4moderate
Monday7 SeptThunder19°C15°C44.2 mm43%94%0 h2low
Tuesday8 SeptLight rain18°C14°C2.6 mm53%79%12.3 h3moderate
Wednesday9 SeptShowers21°C14°C34.6 mm47%93%2.3 h4moderate
Thursday10 SeptLight rain18°C15°C4 mm45%79%12.4 h1low
Friday11 SeptLight rain18°C15°C2.6 mm39%83%11 h4moderate

The first three to five days of the forecast for Swansea are the most reliable; from day seven onwards it is an indicative trend. Click a day in the overview above for hourly detail. Source: Open-Meteo (Met Office, DWD, ECMWF).

Background & outlook

The weather in Swansea

Current conditions and the 14 day forecast

Swansea lies in Wales, an area with a maritime climate: mild winters, cool summers, changeable skies and rain spread across the whole year. That is exactly why a two-week outlook is useful here — it shows the pattern rather than one snapshot.

What is the weather like in Swansea right now?

It is currently 19°C in Swansea with cloudy. It feels like 19°C, humidity is 86% and the wind is SSE 10 km/h.

Today (Saturday) reaches a maximum of 20°C and a minimum of 16°C, with 15 mm of rain and 1.9 hours of sunshine. Sunrise is at 06:23 and sunset at 20:09.

Swansea weather tomorrow

Tomorrow (Sunday) the maximum temperature in Swansea is 20°C and the minimum 16°C. Around 9 mm of rain is expected with 3.1 hours of sunshine, and the chance of rain is 100%. The data is refreshed several times a day through Open-Meteo.

Swansea weather this week and next week

Over the coming week the average maximum temperature in Swansea sits around 19°C and the average minimum around 15°C. Roughly 58.2 mm of rain is expected, spread across 5 days, with 0 largely sunny days.

The warmest day in the 14 day forecast for Swansea is Wednesday 9 Sept at 21°C. The coldest night falls on Wednesday 2 Sept at 10°C. Click any day for hourly detail.

Rain, sunshine and UV in Swansea

A daily rainfall total says little on its own: the same 5 mm can be one short downpour or a grey day of drizzle, which is why the hourly chart above is often the more useful of the two. Over the next fortnight the highest UV index for Swansea is 5, which is low to moderate.

How reliable is a 14 day forecast?

The first three to five days are generally very accurate. After that the certainty drops off and it is better read as a trend than as an exact daily prediction. Our data comes from Open-Meteo, which combines national weather models — among them the Met Office, DWD and ECMWF — and recomputes them several times a day using measurements from stations worldwide.

Forecast for Swansea last updated: 29 August 2026 at 14:25. See also all United Kingdom forecasts and the European weather map.

Frequently asked questions

Questions about the weather in Swansea

What is the weather like in Swansea in August 2026?

The forecast at the top of this page shows the current temperature in Swansea plus the maximum and minimum for each of the next 14 days, with rainfall, chance of rain, sunshine hours and UV index. It is refreshed several times a day.

How accurate is the 14 day forecast for Swansea?

The first three to five days for Swansea are highly reliable. From day six onwards, read the forecast as a trend: it shows whether it turns warmer, cooler, wetter or drier rather than an exact value for that day.

Will it rain in Swansea this week?

The rainfall chart on this page gives the expected millimetres per day for Swansea, and each day card shows the chance of rain as a percentage. Below 20% with several hours of sunshine is a genuinely dry day.

How warm does it get in Swansea over the next two weeks?

The temperature chart shows the maximum and minimum for every one of the next 14 days in Swansea. The overview table underneath repeats the same figures day by day, together with the average across the fortnight.

Can I see the weather in Swansea hour by hour?

Yes. The hourly chart covers the next 48 hours in Swansea with temperature, feels-like temperature and chance of rain. Clicking any of the 14 days opens a panel with night, morning, afternoon and evening detail.

Where does the Swansea forecast come from?

The data for Swansea (Wales, United Kingdom) comes from Open-Meteo, which combines national weather models such as those of the Met Office, DWD, Météo-France and ECMWF and recomputes them several times a day.

What does the UV index for Swansea mean?

The UV index runs from 0 to 11+. Up to 2 is low, 3 to 5 moderate, 6 to 7 high and 8 or more very high. From 6 upwards it is worth using sun protection in the middle of the day, even when it does not feel especially hot.

Is the Swansea weather forecast free?

Yes. The full 14 day forecast for Swansea is free, needs no account and carries no adverts inside the charts.