Best time to visit Seal Beach
The best time to visit Seal Beach is January–December, judged on twenty years of weather records and the events worth going for.
Seal Beach, California, United States
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 18.5 °C / 65 °F | 9.6 °C / 49 °F | 55 mm / 2.1 in | best month |
| February | 18.5 °C / 65 °F | 10.1 °C / 50 °F | 55 mm / 2.1 in | best month |
| March | 19.2 °C / 67 °F | 11.5 °C / 53 °F | 42 mm / 1.7 in | best month |
| April | 20.5 °C / 69 °F | 12.9 °C / 55 °F | 17 mm / 0.6 in | best month |
| May | 21.2 °C / 70 °F | 14.7 °C / 58 °F | 7 mm / 0.3 in | best month |
| June | 23.4 °C / 74 °F | 16.4 °C / 62 °F | 1 mm / 0.1 in | best month |
| July | 25.9 °C / 79 °F | 18.4 °C / 65 °F | 2 mm / 0.1 in | best month |
| August | 26.9 °C / 80 °F | 18.8 °C / 66 °F | 4 mm / 0.1 in | best month |
| September | 26.7 °C / 80 °F | 18.5 °C / 65 °F | 5 mm / 0.2 in | best month |
| October | 24.6 °C / 76 °F | 16 °C / 61 °F | 10 mm / 0.4 in | best month |
| November | 21.8 °C / 71 °F | 12.6 °C / 55 °F | 24 mm / 0.9 in | best month |
| December | 18.3 °C / 65 °F | 9.9 °C / 50 °F | 56 mm / 2.2 in | best month |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: best
- FFebruary: best
- MMarch: best
- AApril: best
- MMay: best
- JJune: best
- JJuly: best
- AAugust: best
- SSeptember: best
- OOctober: best
- NNovember: best
- DDecember: best
- Best
- January–December
Why these months
January · best
In its favour: feels like (high) 16.8 °C / 62 °F, average daily high 18.5 °C / 65 °F, precipitation 55 mm / 2.1 in, share of daylight that is sunny 88%, wet days 4.6 days, days with heavy rain 1.9 days, average daily low 9.6 °C / 49 °F, relative humidity 68%.
February · best
In its favour: feels like (high) 16.9 °C / 62 °F, average daily high 18.5 °C / 65 °F, precipitation 55 mm / 2.1 in, share of daylight that is sunny 87%, wet days 5.1 days, days with heavy rain 1.6 days, average daily low 10.1 °C / 50 °F, relative humidity 69%.
March · best
In its favour: feels like (high) 18.2 °C / 65 °F, average daily high 19.2 °C / 67 °F, precipitation 42 mm / 1.7 in, share of daylight that is sunny 91%, wet days 5.3 days, days with heavy rain 1.4 days, average daily low 11.5 °C / 53 °F, relative humidity 71%.
April · best
In its favour: feels like (high) 19.9 °C / 68 °F, average daily high 20.5 °C / 69 °F, precipitation 17 mm / 0.6 in, share of daylight that is sunny 90%, wet days 2.5 days, days with heavy rain 0.7 days, average daily low 12.9 °C / 55 °F, relative humidity 69%.
May · best
In its favour: feels like (high) 21.3 °C / 70 °F, average daily high 21.2 °C / 70 °F, precipitation 7 mm / 0.3 in, share of daylight that is sunny 92%, wet days 1.4 days, days with heavy rain 0.1 days, average daily low 14.7 °C / 58 °F, relative humidity 71%.
June · best
In its favour: feels like (high) 24.5 °C / 76 °F, average daily high 23.4 °C / 74 °F, precipitation 1 mm / 0.1 in, share of daylight that is sunny 95%, wet days 0.4 days, days with heavy rain 0 days, average daily low 16.4 °C / 62 °F, relative humidity 73%.
July · best
In its favour: feels like (high) 27.8 °C / 82 °F, average daily high 25.9 °C / 79 °F, precipitation 2 mm / 0.1 in, share of daylight that is sunny 97%, wet days 0.4 days, days with heavy rain 0 days, average daily low 18.4 °C / 65 °F, relative humidity 72%.
August · best
In its favour: feels like (high) 28.9 °C / 84 °F, precipitation 4 mm / 0.1 in, share of daylight that is sunny 96%, average daily high 26.9 °C / 80 °F, wet days 0.3 days, days with heavy rain 0.1 days, average daily low 18.8 °C / 66 °F, relative humidity 72%.
September · best
In its favour: feels like (high) 28 °C / 82 °F, precipitation 5 mm / 0.2 in, share of daylight that is sunny 94%, average daily high 26.7 °C / 80 °F, wet days 0.9 days, days with heavy rain 0.1 days, average daily low 18.5 °C / 65 °F, relative humidity 72%.
October · best
In its favour: feels like (high) 24.4 °C / 76 °F, average daily high 24.6 °C / 76 °F, precipitation 10 mm / 0.4 in, share of daylight that is sunny 93%, wet days 2 days, days with heavy rain 0.1 days, average daily low 16 °C / 61 °F, relative humidity 69%.
November · best
In its favour: feels like (high) 20.2 °C / 68 °F, average daily high 21.8 °C / 71 °F, precipitation 24 mm / 0.9 in, share of daylight that is sunny 92%, wet days 2.9 days, days with heavy rain 0.7 days, average daily low 12.6 °C / 55 °F, relative humidity 67%.
December · best
In its favour: feels like (high) 16.5 °C / 62 °F, average daily high 18.3 °C / 65 °F, precipitation 56 mm / 2.2 in, share of daylight that is sunny 86%, wet days 5.4 days, days with heavy rain 1.6 days, average daily low 9.9 °C / 50 °F, relative humidity 69%.
Beach and swimming
Hot, dry and sunny. Penalises the monsoon hard.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: neither
- MMay: good
- JJune: best
- JJuly: best
- AAugust: best
- SSeptember: best
- OOctober: best
- NNovember: good
- DDecember: neither
- Best
- June–October
- Good
- May, November
Why these months
May · good
In its favour: precipitation 7 mm / 0.3 in, share of daylight that is sunny 92%, wet days 1.4 days, days with heavy rain 0.1 days, wind (daily max) 17 km/h / 10 mph.
Against: average daily high 21.2 °C / 70 °F, feels like (high) 21.3 °C / 70 °F, average daily low 14.7 °C / 58 °F.
June · best
In its favour: precipitation 1 mm / 0.1 in, share of daylight that is sunny 95%, wet days 0.4 days, days with heavy rain 0 days, average daily high 23.4 °C / 74 °F, feels like (high) 24.5 °C / 76 °F, wind (daily max) 16 km/h / 10 mph, average daily low 16.4 °C / 62 °F.
July · best
In its favour: precipitation 2 mm / 0.1 in, average daily high 25.9 °C / 79 °F, share of daylight that is sunny 97%, feels like (high) 27.8 °C / 82 °F, wet days 0.4 days, days with heavy rain 0 days, average daily low 18.4 °C / 65 °F, wind (daily max) 16 km/h / 10 mph.
August · best
In its favour: average daily high 26.9 °C / 80 °F, precipitation 4 mm / 0.1 in, share of daylight that is sunny 96%, feels like (high) 28.9 °C / 84 °F, wet days 0.3 days, days with heavy rain 0.1 days, average daily low 18.8 °C / 66 °F, wind (daily max) 16 km/h / 10 mph.
September · best
In its favour: average daily high 26.7 °C / 80 °F, precipitation 5 mm / 0.2 in, share of daylight that is sunny 94%, feels like (high) 28 °C / 82 °F, wet days 0.9 days, days with heavy rain 0.1 days, average daily low 18.5 °C / 65 °F, wind (daily max) 15 km/h / 10 mph.
October · best
In its favour: precipitation 10 mm / 0.4 in, share of daylight that is sunny 93%, average daily high 24.6 °C / 76 °F, wet days 2 days, days with heavy rain 0.1 days, feels like (high) 24.4 °C / 76 °F, wind (daily max) 14 km/h / 9 mph, average daily low 16 °C / 61 °F.
November · good
In its favour: precipitation 24 mm / 0.9 in, share of daylight that is sunny 92%, wet days 2.9 days, days with heavy rain 0.7 days, wind (daily max) 13 km/h / 8 mph.
Against: average daily high 21.8 °C / 71 °F, feels like (high) 20.2 °C / 68 °F, average daily low 12.6 °C / 55 °F.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Mount Waterman, 69 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 16.8 °C | 16.9 °C | 18.2 °C | 19.9 °C | 21.3 °C | 24.5 °C | 27.8 °C | 28.9 °C | 28 °C | 24.4 °C | 20.2 °C | 16.5 °C |
| Days with heavy rain | 1.9 days | 1.6 days | 1.4 days | 0.7 days | 0.1 days | 0 days | 0 days | 0.1 days | 0.1 days | 0.1 days | 0.7 days | 1.6 days |
| Time rain usually falls | 2 pm | 7 am | 12 am | 3 pm | 4 am | 12 pm | 1 pm | 1 pm | 12 pm | 12 pm | 10 am | 6 am |
| Sunshine per day | 9 h | 9.6 h | 10.9 h | 11.8 h | 12.8 h | 13.6 h | 13.7 h | 12.8 h | 11.7 h | 10.5 h | 9.5 h | 8.5 h |
| Relative humidity | 68% | 69% | 71% | 69% | 71% | 73% | 72% | 72% | 72% | 69% | 67% | 69% |
Sea temperature
Averaged over a shorter period (2022–2025) than the twenty-year averages above.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature 2022–2025 | 14.8 °C | 14.5 °C | 14.4 °C | 14.9 °C | 16.9 °C | 18.4 °C | 20 °C | 21.1 °C | 20.7 °C | 19 °C | 17.3 °C | 16.3 °C |
| Sea temperature (daily max) 2022–2025 | 14.9 °C | 14.7 °C | 14.6 °C | 15.2 °C | 17.2 °C | 18.7 °C | 20.3 °C | 21.4 °C | 21 °C | 19.2 °C | 17.5 °C | 16.5 °C |
- Very cold 10 °C or less
- Cold 10 to 15 °C
- Cool 15 to 20 °C
- Comfortable 20 to 25 °C
- Warm 25 to 28 °C
- Very warm over 28 °C
The words describe how the water feels to swim in. They are ours, not an official standard.
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 17.2 µg/m³ | 17.3 µg/m³ | 13.9 µg/m³ | 14.3 µg/m³ | 11.2 µg/m³ | 10.5 µg/m³ | 10.5 µg/m³ | 13.5 µg/m³ | 14.2 µg/m³ | 15.3 µg/m³ | 15.8 µg/m³ | 18.3 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 28.1 µg/m³ | 26.5 µg/m³ | 20.1 µg/m³ | 20.1 µg/m³ | 14.8 µg/m³ | 13.7 µg/m³ | 12.8 µg/m³ | 18.3 µg/m³ | 22.1 µg/m³ | 22.6 µg/m³ | 24.4 µg/m³ | 27.8 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.