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Updated Live on: 21/05/2026 19:50 - 
Summary / Temperature Wind Rain / Melted Snow Outlook
Clear

Currently 18.4°C, Max: 23.3°C, Min: 11.5°C 18.4°C Colder 1.5°C than last hour

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Feels like:  18°C

24-hr Difference
1.9°CWarmer 1.9°C than yesterday at this time
Records Today Yesterday
Highs: 23.3°C
13:01
19.8°C
10:45
Lows: 11.5°C
01:00
11.0°C
05:22
 Wind from SW SW
0.0

Gusting: 4.7 mph
1 Bft - Calm
Max Today: 9.7 at 12:13
Gust Month: 19.8 mph on May 19
Rain Today: 0.0 mm
Rate (mm/hr): 0.0 mm
Yesterday: 0.1 mm
May: 30.0 mm
Rain this Year: 434.9 mm
11 rain days this May
Last Rain: 20/05/2026 at 02:03
Tonight
Partly Cloudy
Partly Cloudy
13°C
Barometer Humidity / Dew Point Moon
Current: 1025.0 mb  
1-Hour Trend: Steady
3-Hour Trend: Falling
High: 1027.0  | Low: 1025.0
Humidity: 62 % Increased 3% since last hour
Humidex: 20.2°C
Dew Point: 11.0°C Decreased 0.6°C since last hour
Wet Bulb: 14.3°C
Waxing Crescent
Waxing Crescent, Moon at 5 days in cycle
32%
Illuminated
UVI Forecast Solar Information
21/05/2026   High   6.4   
22/05/2026   High   6.4   
23/05/2026   High   6.4   
Sunrise is at: 05:08
Solar Noon at: 13:02
Sunset is at: 20:56
Heat Index Cooling Degree Days Sun
Current: 18.4°C
Today: 23.3°C at 13:01
Yesterday: 19.8°C
Last Week: 25.1°C
Record: 34.2°C   19/07/2022
Today: 0.0
May: 0.0
2026 to Date: 0.0
Heating Degree Days
2026 to Date: 1316.0
Daylight: 15:48:00
+ 00:02:37
Almanac Outside Now Station All Time Records Fire Risk
Sunrise is at: 05:08
Sunset is at: 20:56
Moonrise is at: 09:39
Moonset is at: 01:15
Cloud Height: 3160 ft
Thu 21 May
High Tide: 0230 4.4
Low Tide: 0843 0.9
High Tide: 1518 4.4
Low Tide: 2111 1.3
Air Density: 1.219 kg/m3
New Moon: 16 May 2026
Full Moon: 31 May 2026
Server Data
Sys Version: 10.37R-(b79)
Free Memory: 1049MB
Server Temp: 21.3°C
Sys Check: 00:20
Sys Reset: 6 Days 7 Hours 32 Minutes 22 Seconds
Highs: Lows:
35.2°C on:
19/07/2022
-8.2°C on:
10/01/2009
Avg Daytime Records
  29.2°C on: 19 Jul 2022   -4.0°C on: 01 Mar 2018
Avg Night Time Records
  24.8°C on: 20 Jul 2016   -6.1°C on: 10 Jan 2009
Soton & New Forest Fire Index
Currently:
8.0 at 19:50


Tomorrow's and Tomorrow night's Outlook for the Southampton Area
Tomorrow
Mostly Sunny
Mostly Sunny
25°C
Except for a few afternoon clouds, mainly sunny. Warm. High near 25C. Winds SSE at 5 to 10 mph.
Tomorrow night
Mostly Cloudy
Mostly Cloudy
14°C
Partly cloudy skies in the evening, then becoming cloudy overnight. Muggy. Low 14C. Winds SSE at 5 to 10 mph.
Short Term Weather Forecast for the Southampton Area
Tomorrow night
Mostly Cloudy
Mostly Cloudy
14°C
Saturday
Sunny
Sunny
28°C
Saturday night
Clear
Clear
14°C
Sunday
Sunny
Sunny
29°C
Sunday night
Clear
Clear
16°C
Monday
Sunny
Sunny
30°C