| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 8.5° | 2.4° | 58.8mm | 14.3 | 35 |
| February | 9.6° | 3° | 48.1mm | 12.9 | 41 |
| March | 12° | 4.1° | 42.5mm | 11.8 | 51 |
| April | 15.2° | 6° | 39.7mm | 10.7 | 63 |
| May | 18.7° | 9.2° | 45.8mm | 10.8 | 74 |
| June | 21.9° | 12.2° | 46.5mm | 9.6 | 81 |
| July | 24.1° | 14.2° | 46mm | 10.6 | 79 |
| August | 23.5° | 14.2° | 54mm | 10.9 | 78 |
| September | 20.6° | 11.9° | 49.9mm | 10.2 | 80 |
| October | 16.2° | 9.1° | 67.3mm | 13.8 | 60 |
| November | 11.6° | 5.2° | 68.5mm | 14.3 | 45 |
| December | 9° | 3.1° | 58.4mm | 14.5 | 36 |
January in Southend-on-Sea averages a daily high of 8.5°C with nights around 2.4°C. Expect roughly 14.3 wet days totalling 58.8mm. Demanding conditions — pack for it and plan indoor options.
February in Southend-on-Sea averages a daily high of 9.6°C with nights around 3°C. Expect roughly 12.9 wet days totalling 48.1mm. Demanding conditions — pack for it and plan indoor options.
March in Southend-on-Sea averages a daily high of 12°C with nights around 4.1°C. Expect roughly 11.8 wet days totalling 42.5mm. Demanding conditions — pack for it and plan indoor options.
April in Southend-on-Sea averages a daily high of 15.2°C with nights around 6°C. Expect roughly 10.7 wet days totalling 39.7mm. Generally workable, with some weather to plan around.
May in Southend-on-Sea averages a daily high of 18.7°C with nights around 9.2°C. Expect roughly 10.8 wet days totalling 45.8mm. Generally workable, with some weather to plan around.
June in Southend-on-Sea averages a daily high of 21.9°C with nights around 12.2°C. Expect roughly 9.6 wet days totalling 46.5mm. Comfortable conditions for being outdoors all day.
July in Southend-on-Sea averages a daily high of 24.1°C with nights around 14.2°C. Expect roughly 10.6 wet days totalling 46mm. Comfortable conditions for being outdoors all day.
August in Southend-on-Sea averages a daily high of 23.5°C with nights around 14.2°C. Expect roughly 10.9 wet days totalling 54mm. Comfortable conditions for being outdoors all day.
September in Southend-on-Sea averages a daily high of 20.6°C with nights around 11.9°C. Expect roughly 10.2 wet days totalling 49.9mm. Comfortable conditions for being outdoors all day.
October in Southend-on-Sea averages a daily high of 16.2°C with nights around 9.1°C. Expect roughly 13.8 wet days totalling 67.3mm. Generally workable, with some weather to plan around.
November in Southend-on-Sea averages a daily high of 11.6°C with nights around 5.2°C. Expect roughly 14.3 wet days totalling 68.5mm. Demanding conditions — pack for it and plan indoor options.
December in Southend-on-Sea averages a daily high of 9°C with nights around 3.1°C. Expect roughly 14.5 wet days totalling 58.4mm. Demanding conditions — pack for it and plan indoor options.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Southend-on-Sea peaks at 81.
Based on 30 years of records, May–September scores highest for comfort in Southend-on-Sea, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 24.1°C.
November is the wettest, averaging 68.5mm of rain across roughly 14.3 wet days.
January is the coolest month, with average daily highs around 8.5°C.