San Gregorio State Beach Surf Forecast

/ CAL – San Mateo (15 breaks) / California (404 breaks) /

USA (1297 breaks) / Lat Long: (37.33° N 122.40° W)

Surf Forecasts:

San Gregorio State Beach surfForecast / CAL – San Mateo / USA

48hr Weather and Surf, issued 4 pm Monday 15 Sep 2025 PDT

Forecast update in hr min s Forecast update imminent

San Gregorio State Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's San Gregorio State Beach sea temperature is 16.4° C
(Which is 1.5°C warmer than normal for this time of year)

How big are the waves at San Gregorio State Beach today?

The current surf forecast for San Gregorio State Beach at 11PM is: 0.5m 20s primary swell from a South-southwest direction and 1.1m 8s secondary swell from a Northwest direction, 0.6m 10s secondary swell from a West-northwest direction (forecast issued at 04:00pm September 15). The wind direction is predicted to be glassy and the swell rating is 2.

Time (PDT) & Date	Wave Height	Wave Period
Morning (15 Sep)	-	-
Afternoon (15 Sep)	5ft (1.5m)	8s
Evening (15 Sep)	4ft (1.2m)	8s

Table - waves today at San Gregorio State Beach. (Swell directed towards the surf break)

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Monday 15				Tuesday 16								Wednesday 17								Thursday 18
	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM	2 PM	5 PM	8 PM	11 PM	2 AM	5 AM	8 AM	11 AM
Rating (10 max)	1	2	1	2	3	3	2	1	0	0	1	1	1	1	1	0	0	0	1	1	2	2	2	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	WNW	WNW	WNW	SSW	WNW	S	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	WNW	WNW	SSW	WNW	WNW	WNW
Period(s) (?)	8	8	8	20	10	19	18	18	18	18	18	17	16	16	16	16	16	15	10	8	15	8	8	10
Wave Graph (?)
Energy (?)	481	537	392	448	505	500	481	442	424	424	391	355	421	415	468	473	413	475	479	384	492	517	567	794
Wind (km/h)	WNW	NW	N	N	WNW	NNE	S	W	WNW	NW	NNW	NNW	NNW	N	NNW	NW	NW	NW	NW	W	SSW	WSW	WNW	NNW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	cross	glass	glass	glass	glass	on	cross- on	cross- on	cross	cross	cross- on	cross	cross	cross- on	cross- on	cross- on	cross- on	on	glass	cross- on	cross- on	cross- on
High Tide / height (m)			5:44PM 2.16					8:25AM 1.76			6:57PM 2.17					9:08AM 1.84			8:00PM 2.19					9:42AM 1.92
Low Tide / height (m)	11:41AM 1.40				1:21AM 0.32				1:05PM 1.33					2:17AM 0.30				2:10PM 1.21				3:03AM 0.30

	Monday 15				Tuesday 16								Wednesday 17								Thursday 18
Sunrise	-	-	-	-	-	-	6:52	-	-	-	-	-	-	-	6:52	-	-	-	-	-	-	-	6:52	-
Sunset	-	7:16	-	-	-	-	-	-	-	7:15	-	-	-	-	-	-	-	7:14	-	-	-	-	-	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	20	20	17	18	17	18	19	22	21	20	18	19	18	18	19	22	20	20	17	17	16	16	15	16
Feels °C (?)	19	20	17	19	18	19	20	22	20	19	17	18	17	17	18	21	19	18	16	17	16	16	14	15

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for CAL - San Mateo

Wind Update Continuing clean conditions at San Gregorio State Beach (calm at Half Moon Bay wx 15 km from San Gregorio State Beach). 1.1m 8s swell from the WNW with a 0.6m 13s groundswell from the SSW and a 0.4m 19s long period groundswell, also from the SSW. 3 swells combining to make bigger set waves.
59 minutes ago San Gregorio State Beach

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Actual: 59 min ago

0 km/h

Clean

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