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Updated Live on: 18/08/2026 11:00 - 
Summary / Temperature Wind Rain / Melted Snow Outlook
mostly cloudy

Currently 20.8°C, Max: 20.9°C, Min: 16.0°C 20.8°C Colder 0.1°C than last hour

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Feels like:  21°C

24-hr Difference
-2.6°CColder 2.6°C than yesterday at this time
Records Today Yesterday
Highs: 20.9°C
09:36
27.6°C
16:06
Lows: 16.0°C
03:13
16.2°C
06:15
 Calm NE
0.0

Gusting: 0.0 mph
0 Bft - Calm
Max Today: 12.8 at 09:28
Gust Month: 14.1 mph on Aug 4
Rain Today: 0.0 mm
Rate (mm/hr): 0.0 mm
Yesterday: 0.0 mm
August: 0.0 mm
Rain this Year: 516.6 mm
48 days since it last rained
Last Rain: 30/06/2026 at 09:46
Today
AM Light Rain
AM Light Rain
25°C
Barometer Humidity / Dew Point Moon
Current: 1011.0 mb  
1-Hour Trend: Steady
3-Hour Trend: Falling slowly
High: 1015.0  | Low: 1011.0
Humidity: 90 % Increased 5% since last hour
Humidex: 27.7°C
Dew Point: 19.1°C Increased 0.8°C since last hour
Wet Bulb: 19.7°C
Waxing Crescent
Waxing Crescent, Moon at 5 days in cycle
34%
Illuminated
UVI Forecast Solar Information
18/08/2026   Medium   5.9   
19/08/2026   Medium   5.3   
20/08/2026   Medium   4.7   
Sunrise is at: 05:57
Solar Noon at: 13:09
Sunset is at: 20:20
Heat Index Cooling Degree Days Sun
Current: 20.8°C
Today: 20.9°C at 09:36
Yesterday: 28.8°C
Last Week: 33.5°C
Record: 39.7°C   25/06/2026
Today: 0.0
August: 46.1
2026 to Date: 228.6
Heating Degree Days
2026 to Date: 1383.4
Daylight: 14:23:00
-00:03:33
Almanac Outside Now Station All Time Records Fire Risk
Sunrise is at: 05:57
Sunset is at: 20:20
Moonrise is at: 13:09
Moonset is at: 21:53
Cloud Height: 806 ft
Tue 18 August
High Tide: 0250 4.3
Low Tide: 0851 1.0
High Tide: 1533 4.4
Low Tide: 2112 1.3
Air Density: 1.188 kg/m3
New Moon: 12 August 2026
Full Moon: 28 August 2026
Server Data
Sys Version: 10.37R-(b79)
Free Memory: 1049MB
Server Temp: 25.8°C
Sys Check: 00:20
Sys Reset: 3 Days 21 Hours 28 Minutes 51 Seconds
Highs: Lows:
35.5°C on:
25/06/2026
-8.2°C on:
10/01/2009
Avg Daytime Records
  30.8°C on: 25 Jun 2026   -4.0°C on: 01 Mar 2018
Avg Night Time Records
  26.8°C on: 26 Jun 2026   -6.1°C on: 10 Jan 2009
Soton & New Forest Fire Index
Currently:
-0.9 at 11:00


Tonight's and Tomorrow's Outlook for the Southampton Area
Tonight
Light Rain Late
Light Rain Late
16°C
Cloudy skies with periods of light rain late. Low 16C. Winds W at 10 to 15 mph. Chance of rain 60%.
Tomorrow
PM Showers
PM Showers
23°C
Cloudy with occasional showers for the afternoon. High 23C. Winds WSW at 10 to 15 mph. Chance of rain 50%.
Short Term Weather Forecast for the Southampton Area
Tomorrow
PM Showers
PM Showers
23°C
Tomorrow night
Partly Cloudy
Partly Cloudy
14°C
Thursday
PM Showers
PM Showers
22°C
Thursday night
Partly Cloudy
Partly Cloudy
12°C
Friday
Showers
Showers
21°C
Friday night
Partly Cloudy
Partly Cloudy
11°C