Click on a day for an hourly weather forecast
The temperatures in Oceanside in May are usually low and can range between 14°C and 20°C.
There is little to no rain in Oceanside during May, so it’s a lot easier to explore the city. Just remember to dress in warm layers, as it can still get pretty chilly.
Our weather forecast can give you a great sense of what weather to expect in Oceanside in May 2025.
If you’re planning to visit Oceanside in the near future, we highly recommend that you review the 14 day weather forecast for Oceanside before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 19° / 12° | 2 | 29 | 0 | 37 mm | Good | Oceanside in January |
| February | 18° / 11° | 2 | 27 | 0 | 39 mm | Good | Oceanside in February |
| March | 18° / 12° | 1 | 30 | 0 | 26 mm | Good | Oceanside in March |
| April | 19° / 13° | 1 | 30 | 0 | 13 mm | Good | Oceanside in April |
| May | 20° / 14° | 0 | 31 | 0 | 14 mm | Good | Oceanside in May |
| June | 22° / 16° | 0 | 30 | 0 | 7 mm | Good | Oceanside in June |
| July | 24° / 18° | 1 | 30 | 0 | 26 mm | Perfect | Oceanside in July |
| August | 25° / 19° | 1 | 30 | 0 | 14 mm | Perfect | Oceanside in August |
| September | 26° / 19° | 1 | 29 | 0 | 14 mm | Perfect | Oceanside in September |
| October | 24° / 17° | 1 | 30 | 0 | 12 mm | Perfect | Oceanside in October |
| November | 21° / 15° | 1 | 29 | 0 | 24 mm | Good | Oceanside in November |
| December | 18° / 12° | 2 | 29 | 0 | 39 mm | Good | Oceanside in December |