Sway Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Sway.
Climate overview of Sway
Temperatures in Sway, Hampshire, United Kingdom, vary greatly throughout the year. August is the hottest month at 21°C (70°F), while February is the coldest at 9°C (48°F).
Sway sees a moderate amount of rainfall, totalling around 950 mm (37 in) per year. It experiences pleasant summers and cold winters, creating some seasonal variation. July is the sunniest month, averaging 7.4 hours of sunshine per day.
Sway Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Sway - and find the best time to visit.
Monthly Temperature in Sway
The climate in Sway is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a pleasant 21°C (70°F) in August, the warmest time of the year, to a chilly 9°C (48°F) during cooler months like February.
At night, you can expect temperatures ranging from 15°C (59°F) in August to around 4°C (39°F) during February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Sway
Generally, Sway receives mid-range precipitation levels, with 950 mm (37 in) annually. While rainfall varies throughout the year, each season offers its own charm. November brings wetter days averaging 110 mm (4.3 in) of precipitation, spread over 15 rainy days.
In contrast, the driest month May experiences a drier climate, with about 60 mm (2.4 in) of rainfall spread across 13 rainy days. For more details, please visit our Sway Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Sway
Seasonal changes in sunshine hours are quite dramatic in Sway. While July receives considerable daily sunshine with up to 7.4 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.8 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Sway
The mean water temperature over the year ranges from 9°C (48°F) in March to 17°C (63°F) in September.
Water temperature over the year
Humidity in Sway by Month
The city experiences its highest humidity in January, reaching 91%. In April, the humidity drops to its lowest level at 73%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Sway
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July and August
- Warmest weather: July and August
- Most sunshine: May, June and July
- Fewest rainy days: June, July and August
- Warmest water temperature: August, September and October, although the water may still feel cool.
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Sway
What is the best time to visit Sway?
July and August typically offer the most optimal weather in Sway. In contrast, January, February, November and December tend to have less optimal conditions. Sway has pleasant summers and cold winters.
What temperatures can I expect in Sway?
Daytime highs range from 9°C (48°F) in February to 21°C (70°F) in August. Nighttime lows range from 4°C (39°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Sway get?
Annual rainfall is around 950 mm (37 in). November is the wettest month with 110 mm (4.3 in), while May is the driest with 60 mm (2.4 in).
How sunny is Sway?
Sway receives around 1,694 hours of sunshine per year. July is the sunniest month with 222 hours, while December is the cloudiest with just 54 hours.
Sway 3-Day Forecast
Sway 3-Day Forecast
Sway on the map
Sway is highlighted - select any city to see its climate.
Popular this month
Where to go in July - average daytime high across popular destinations.
London
23°C (73°F) Bath22°C (72°F) York22°C (72°F) Manchester
21°C (70°F) Edinburgh
19°C (66°F) Glasgow19°C (66°F) Torquay20°C (68°F) Blackpool19°C (66°F) 
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