, in the northern part of San Diego County, in an urban agglomeration that also includes the cities of Vista and Carlsbad. Like in San Diego, the climate is very mild due to the
flowing in the ocean.
wind blows from the deserts areas of the interior. On average, there are only 5 days with a maximum temperature equal to or above 32 °C (90 °F).
of the year, the temperature normally reaches 37/38 °C (99/100 °F), usually in September or October, but during some years it does not exceed 33/34 °C (91/93 °F). However, in September 2010 it reached 40.5 °C (105 °F).
, there are several sunny days and some periods of bad weather. In good weather, the temperature can drop to 0 °C (32 °F) or slightly below at night, but during the day the air becomes mild.
For the amount of sunshine, we can refer to the data from San Diego. Here, there are about 3,000 hours of sunshine per year, so the amount of sunshine is very good. In May and June, fog can form, so the hours of sunshine decrease slightly.
temperature ranges between 15 °C (59 °F) and 20.5 °C (69 °F): so, the sea remains a bit cold even in summer.
Having a good climate, Oceanside can be visited all year round. However, from December to March, it can rain, and it can get a bit cold at night. In May and June, there may be morning mists. In summer, but especially in September and October, there can be very hot days, when the wind blows from the desert.
The best time to go to the beach is from July to October, when the sea is less cold.
The following data were recorded at the airport, which is 4 km (2.5 mi) away from the coast. On the seafront, the temperature in summer is even lower, so much so that it often remains around 20 °C (68 °F) even in July and August. In winter, on the other hand, nights are milder, and in practice the temperature never drops below freezing.
. Here are the average temperatures.
January is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of
12 °C, with a minimum of
4.7 °C and a maximum of
19.3 °C.
On the coldest nights of the month, the temperature usually drops to around
-0.5 °C.
On the warmest days of the month, the temperature usually reaches around
27.5 °C.
Precipitation amounts to
60 mm, distributed over 6 days.
The day lasts on average 10 hours and 20 minutes.
The average humidity is 69%.
The average wind speed is of
5.9 kph.
The average sea temperature is of
14.9 °C. Therefore, the sea is cold for swimming.
February is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of
12.2 °C, with a minimum of
5.6 °C and a maximum of
18.9 °C.
On the coldest nights of the month, the temperature usually drops to around
0.5 °C.
On the warmest days of the month, the temperature usually reaches around
26.5 °C.
Precipitation amounts to
75 mm, distributed over 9 days.
The day lasts on average 11 hours and 0 minutes.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
6.7 kph.
The average sea temperature is of
14.9 °C. Therefore, the sea is cold for swimming.
March is generally a mild month. The average temperature is of
13.5 °C, with a minimum of
7.9 °C and a maximum of
19.1 °C.
On the coldest nights of the month, the temperature usually drops to around
3 °C.
On the warmest days of the month, the temperature usually reaches around
27 °C.
Precipitation amounts to
45 mm, distributed over 8 days.
The day lasts on average 12 hours and 0 minutes.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of
6.8 kph.
The average sea temperature is of
15.1 °C. Therefore, the sea is cold for swimming.
April is generally a very mild month. The average temperature is of
14.6 °C, with a minimum of
8.7 °C and a maximum of
20.5 °C.
On the coldest nights of the month, the temperature usually drops to around
3.5 °C.
On the warmest days of the month, the temperature usually reaches around
29 °C.
Precipitation amounts to
20 mm, distributed over 5 days.
The day lasts on average 13 hours and 5 minutes.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of
7.5 kph.
The average sea temperature is of
15.6 °C. Therefore, the sea is cold for swimming.
May is generally a very mild month. The average temperature is of
16.7 °C, with a minimum of
12.4 °C and a maximum of
21 °C.
On the coldest nights of the month, the temperature usually drops to around
7.5 °C.
On the warmest days of the month, the temperature usually reaches around
27.5 °C.
Precipitation amounts to
10 mm, distributed over 4 days.
The day lasts on average 13 hours and 55 minutes.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of
8 kph.
The average sea temperature is of
16.6 °C. Therefore, the sea is cold for swimming.
June is generally a warm month. The average temperature is of
18.6 °C, with a minimum of
14.6 °C and a maximum of
22.6 °C.
On the coldest nights of the month, the temperature usually drops to around
10 °C.
On the warmest days of the month, the temperature usually reaches around
27 °C.
Precipitation amounts to only
5 mm, distributed over 2 days.
The day lasts on average 14 hours and 20 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
7.7 kph.
The average sea temperature is of
18 °C. Therefore, the sea is cold for swimming.
July is generally a warm month. The average temperature is of
20.7 °C, with a minimum of
16.7 °C and a maximum of
24.7 °C.
On the coldest nights of the month, the temperature usually drops to around
13 °C.
On the warmest days of the month, the temperature usually reaches around
29.5 °C.
Precipitation amounts to only
0 mm, so on average it never rains in the whole month.
The day lasts on average 14 hours and 5 minutes. So the days are long.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
7.4 kph.
The average sea temperature is of
19.8 °C. Therefore, the sea is very cool for swimming.
August, the warmest month of the year, is generally a warm month. The average temperature is of
21.2 °C, with a minimum of
16.7 °C and a maximum of
25.7 °C.
On the coldest nights of the month, the temperature usually drops to around
12.5 °C.
On the warmest days of the month, the temperature usually reaches around
30 °C.
Precipitation amounts to only
0 mm, so on average it never rains in the whole month.
The day lasts on average 13 hours and 20 minutes.
The average humidity is 77%. Hence, the air is normally humid.
The average wind speed is of
7.2 kph.
The average sea temperature is of
20.5 °C. Therefore, the sea is cool for swimming.
September is generally a warm month. The average temperature is of
20.3 °C, with a minimum of
15.1 °C and a maximum of
25.4 °C.
On the coldest nights of the month, the temperature usually drops to around
10 °C.
On the warmest days of the month, the temperature usually reaches around
33.5 °C.
Precipitation amounts to only
5 mm, distributed over 2 days.
The day lasts on average 12 hours and 20 minutes.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is of
7 kph.
The average sea temperature is of
20.4 °C. Therefore, the sea is cool for swimming.
October is generally a very mild month. The average temperature is of
17.7 °C, with a minimum of
11.4 °C and a maximum of
23.9 °C.
On the coldest nights of the month, the temperature usually drops to around
5.5 °C.
On the warmest days of the month, the temperature usually reaches around
32.5 °C.
Precipitation amounts to
15 mm, distributed over 5 days.
The day lasts on average 11 hours and 20 minutes.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of
6.3 kph.
The average sea temperature is of
19.3 °C. Therefore, the sea is very cool for swimming.
November is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of
14.1 °C, with a minimum of
6.6 °C and a maximum of
21.6 °C.
On the coldest nights of the month, the temperature usually drops to around
1 °C.
On the warmest days of the month, the temperature usually reaches around
30.5 °C.
Precipitation amounts to
20 mm, distributed over 6 days.
The day lasts on average 10 hours and 25 minutes.
The average humidity is 69%.
The average wind speed is of
5.8 kph.
The average sea temperature is of
17.5 °C. Therefore, the sea is cold for swimming.
December, the coldest month of the year, is generally a mild month. However, there are remarkable differences between night and day. The average temperature is of
11.6 °C, with a minimum of
4.3 °C and a maximum of
18.9 °C.
On the coldest nights of the month, the temperature usually drops to around
-1 °C.
On the warmest days of the month, the temperature usually reaches around
26 °C.
Precipitation amounts to
50 mm, distributed over 7 days.
The day lasts on average 10 hours and 0 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
The average humidity is 71%. Hence, the air is normally humid.
The average wind speed is of
5.7 kph.
The average sea temperature is of
15.7 °C. Therefore, the sea is cold for swimming.