Click on a day for an hourly weather forecast
The temperatures in Newport Beach in September are comfortable with low of 19°C and and high up to 26°C.
You can expect a few rainy days in Newport Beach during September, but usually the weather is comfortable in September.
Our weather forecast can give you a great sense of what weather to expect in Newport Beach in September 2025.
If you’re planning to visit Newport Beach in the near future, we highly recommend that you review the 14 day weather forecast for Newport Beach before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 18° / 11° | 3 | 28 | 0 | 64 mm | Good | Newport Beach in January |
| February | 18° / 11° | 3 | 26 | 0 | 61 mm | Good | Newport Beach in February |
| March | 18° / 11° | 2 | 29 | 0 | 46 mm | Good | Newport Beach in March |
| April | 19° / 12° | 1 | 29 | 0 | 22 mm | Good | Newport Beach in April |
| May | 20° / 14° | 1 | 30 | 0 | 22 mm | Good | Newport Beach in May |
| June | 22° / 15° | 0 | 30 | 0 | 7 mm | Good | Newport Beach in June |
| July | 24° / 18° | 2 | 29 | 0 | 37 mm | Perfect | Newport Beach in July |
| August | 25° / 19° | 1 | 30 | 0 | 29 mm | Perfect | Newport Beach in August |
| September | 26° / 19° | 1 | 29 | 0 | 20 mm | Perfect | Newport Beach in September |
| October | 23° / 17° | 1 | 30 | 0 | 29 mm | Perfect | Newport Beach in October |
| November | 21° / 14° | 1 | 29 | 0 | 35 mm | Good | Newport Beach in November |
| December | 18° / 11° | 3 | 28 | 0 | 87 mm | Good | Newport Beach in December |