Weather in Marshall Beach, San Francisco, United States in September

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Visiting Marshall Beach, San Francisco, United States in September

September is one of the best months to visit Marshall Beach for the best beach weather. It has the most sunshine and best sunbathing and swimming conditions of the year.

The weather in September is slightly warmer than the previous month. September has average maximum temperatures of 23°C (74°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 73% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.1hrs making the days long and bright.

September has total rainfall of 0.3cm (0.1inches) making it extremely dry with only very rare light showers. There are just 1.1 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between.

Sea temperatures are a cold 17°C (62°F). September is too cold for swimming in Marshall Beach for any length of time, unless you have a wetsuit. The sea temperature in September is slightly warmer than the previous month.

September offers warm weather and sunshine, making it a pleasant time for swimming, sunbathing, snorkeling, and diving. The winds and waves may start to pick up again during this month, making it a more favorable time for surfing, windsurfing, and kitesurfing. Also consider visiting Marshall Beach in one of the other best months of June, July, August, for the best beach weather. Also consider one of our other suggestions for September.

Can you sunbathe in Marshall Beach in September?

Yes, September is a great time for sunbathing in Marshall Beach.

September has average maximum temperatures of 23°C (74°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 73% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.1hrs making the days long and bright. September has total rainfall of 0.3cm (0.1inches) making it extremely dry with only very rare light showers. There are just 1.1 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between.

More about September temperature and sunshine.

Can you swim in Marshall Beach in September?

No, September is too cold for swimming in Marshall Beach for any length of time, with the sea water at 17°C (62°F), unless you have a wetsuit.

More about September sea temperatures.

Is September a good time to holiday in Marshall Beach?

Yes, September is a good time for a holiday in Marshall Beach.

September has average maximum temperatures of 23°C (74°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 73% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.1hrs making the days long and bright. September has total rainfall of 0.3cm (0.1inches) making it extremely dry with only very rare light showers. There are just 1.1 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between. Sea temperatures are a cold 17°C (62°F). September is too cold for swimming in Marshall Beach for any length of time, unless you have a wetsuit.

More about the September temperatures and sunshine.

Is Marshall Beach warm in September?

Yes, Marshall Beach is nice and warm and makes sunbathing pleasant on clear days in September.

The average maximum temperature in Marshall Beach in September is 23°C (74°F). The average maximum temperature is 22°C (72°) in the previous month and 22°C (71°F) in the next month.

The average temperature in Marshall Beach in September is 19°C (65°F). The average temperature is 18°C (64°F) in the previous month and 17°C (63°F) in the next month.

More info about the September temperatures and sunshine.

How sunny is Marshall Beach in September?

The average day light hours per day in Marshall Beach in September are 12.4. The sunshine percentage is 73% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.1hrs making the days long and bright.

More about September sunshine.

Crowds in Marshall Beach in September

September sees a decrease in visitors as the summer season comes to an end. The beach is still relatively busy, especially during Labor Day weekend, but the crowds start to thin out as the month progresses. The weather remains pleasant for beach visits.

Temperature in Marshall Beach in September

The weather in September is slightly warmer than the previous month. The average maximum temperature in Marshall Beach in September is 23°C (74°F). The average maximum temperature is 22°C (72°F) in the previous month and 22°C (71°F) in the next month.

The average temperature in Marshall Beach in September is 19°C (65°F). The average temperature is 18°C (64°F) in the previous month and 17°C (63°F) in the next month.

The average minimum temperature in Marshall Beach in September is 14°C (56°F). The minimum temperature is 14°C (56°F) in the previous month and 13°C (55°F) in the next month.

Sunshine in Marshall Beach in September

The days in September are shorter than the previous month and days continue to get shorter into October. September has less hours of sunshine than the previous month and hours of sunshine continue to drop quickly into October. During September the average day light hours are 12.4 per day in Marshall Beach. The sunshine percentage is 73% making it sunny and pleasant most of the time. The hours of sunshine per day are 9.1hrs making the days long and bright.

The ultraviolet index in Marshall Beach in September is typically 7.6 during September. An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Marshall Beach in September

The average sea water temperature in Marshall Beach in September is 16.7°C (62.1°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water. The sea temperature in September is slightly warmer than the previous month.

Rainfall in Marshall Beach in September

September weather is marginally wetter than the previous month and rainfall continues to rise into October. September has a couple of more days of rain than the previous month and rainy days continue to rise into October. The average total rainfall in Marshall Beach in September is 0.3cm (0.1inches) and on average there are 1.1 rainy days in September making it an extremely dry time to visit the beach.

Humidity in Marshall Beach in September

The maximum dew point (an indicator of humidity) in Marshall Beach in September is 14°C (56°F) which is comfortable for everyone. The dew point is 13°C (56°F) in the previous month and 13°C (13°F) in the next month.

The average maximum relative humidity in Marshall Beach in September is typically 86.1%. The maximum relative humidity is 88% in the previous month and 85% in the next month.

The average relative humidity in Marshall Beach in September is typically 68.6%. The average relative humidity is 72% in the previous month and 67.3% in the next month.

Wind Speed in Marshall Beach in September

The average maximum wind speed in Marshall Beach in September is typically 38KM/H (24MPH). The average maximum wind speed is 40KM/H (25MPH) in the previous month and 34KM/H (21MPH) in the next month.

The average wind speed in Marshall Beach in September is typically 17KM/H (11MPH). The average wind speed is 19KM/H (12MPH) in the previous month and 14KM/H (9MPH) in the next month.

The average wind direction in Marshall Beach in September is from the West-Northwest.

Monthly Averages

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