Alert archive / California / Beach Hazards Statements in 2025
Beach Hazards Statement 13, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this beach hazards statement at Aug 29, 2025, 12:42 PM PDT for 4 counties in California. It took effect at Aug 30, 2025, 5:00 AM PDT. It was in force for 66 hr.
The area
The counties it named.
The facts
- Issued
- Aug 29, 2025, 12:42 PM PDT (19:42 UTC)
- In effect from
- Aug 30, 2025, 5:00 AM PDT
- Expired
- Sep 1, 2025, 11:00 PM PDT
- In force
- 66 hr
- Issued by
- NWS San Francisco Bay Area, CA
Counties Marin County, CA, San Mateo County, CA, Santa Cruz County, CA, Sonoma County, CA
The radar
The San Francisco radar (KMUX), 86 km from the middle of the area, began a volume at 19:40 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Oakland, CA (KOAK), launched 12:00Z, 7.7 hours before the alert went out and 27 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1575 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
114 WHUS46 KMTR 291942 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1242 PM PDT Fri Aug 29 2025 CAZ505-509-529-300345- /O.NEW.KMTR.BH.S.0013.250830T1200Z-250902T0600Z/ Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- 1242 PM PDT Fri Aug 29 2025 ...BEACH HAZARDS STATEMENT IN EFFECT FROM LATE TONIGHT THROUGH MONDAY EVENING... * WHAT...A long period southwesterly swell will result in an increased risk for sneaker waves and rip currents. * WHERE...Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, and Northern Monterey Bay. * WHEN...From late tonight through Monday evening. * IMPACTS...Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. Rip currents are typically more frequent and stronger in the vicinity of jetties, inlets, and piers. Swimmers should always swim near a lifeguard. * ADDITIONAL DETAILS...Greatest risk will be along southwest facing beaches. Coastal sections of Marin and Santa Cruz counties. In particular southwest facing beaches, including but not limited to Stinson Beach, Santa Cruz Boardwalk Beach, and Twin Lakes Beach. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
5 follow-up statements
028 WHUS46 KMTR 300102 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 602 PM PDT Fri Aug 29 2025 CAZ505-509-529-301200- /O.CON.KMTR.BH.S.0013.250830T1200Z-250902T0600Z/ Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- 602 PM PDT Fri Aug 29 2025 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 5 AM PDT SATURDAY THROUGH MONDAY EVENING... * WHAT...A long period southwesterly swell will result in an increased risk for sneaker waves and rip currents. * WHERE...Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast and Northern Monterey Bay Counties. * WHEN...From 5 AM PDT Saturday through Monday evening. * IMPACTS...Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. Rip currents are typically more frequent and stronger in the vicinity of jetties, inlets, and piers. Swimmers should always swim near a lifeguard. * ADDITIONAL DETAILS...Greatest risk will be along southwest facing beaches. Coastal sections of Marin and Santa Cruz counties. In particular southwest facing beaches, including but not limited to Stinson Beach, Santa Cruz Boardwalk Beach, and Twin Lakes Beach. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
971 WHUS46 KMTR 301144 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 444 AM PDT Sat Aug 30 2025 CAZ505-509-529-301945- /O.CON.KMTR.BH.S.0013.250830T1200Z-250902T0600Z/ Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- 444 AM PDT Sat Aug 30 2025 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH MONDAY EVENING... * WHAT...A long period southwesterly swell will result in an increased risk for sneaker waves and rip currents. * WHERE...Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast and Northern Monterey Bay Counties. * WHEN...Through Monday evening. * IMPACTS...Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. Rip currents are typically more frequent and stronger in the vicinity of jetties, inlets, and piers. Swimmers should always swim near a lifeguard. * ADDITIONAL DETAILS...Greatest risk will be along southwest facing beaches. Coastal sections of Marin and Santa Cruz counties. In particular southwest facing beaches, including but not limited to Stinson Beach, Santa Cruz Boardwalk Beach, and Twin Lakes Beach. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
289 WHUS46 KMTR 301927 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 1227 PM PDT Sat Aug 30 2025 CAZ505-509-529-310445- /O.CON.KMTR.BH.S.0013.000000T0000Z-250902T0600Z/ Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- 1227 PM PDT Sat Aug 30 2025 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH MONDAY EVENING... * WHAT...A long period southwesterly swell will result in an increased risk for sneaker waves and rip currents. * WHERE...Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast and Northern Monterey Bay Counties. * WHEN...Through Monday evening. * IMPACTS...Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. Rip currents are typically more frequent and stronger in the vicinity of jetties, inlets, and piers. Swimmers should always swim near a lifeguard. * ADDITIONAL DETAILS...Greatest risk will be along southwest facing beaches. Coastal sections of Marin and Santa Cruz counties. In particular southwest facing beaches, including but not limited to Stinson Beach, Santa Cruz Boardwalk Beach, and Twin Lakes Beach. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$
702 WHUS46 KMTR 310350 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 850 PM PDT Sat Aug 30 2025 CAZ505-509-529-010400- /O.CON.KMTR.BH.S.0013.000000T0000Z-250902T0600Z/ Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- 850 PM PDT Sat Aug 30 2025 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH MONDAY EVENING... * WHAT...A long period southwesterly swell will result in an increased risk for sneaker waves and rip currents. * WHERE...Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, and Northern Monterey Bay. * WHEN...Through Monday evening. * IMPACTS...Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. Rip currents are typically more frequent and stronger in the vicinity of jetties, inlets, and piers. Swimmers should always swim near a lifeguard. * ADDITIONAL DETAILS...Greatest risk will be along southwest facing beaches. Coastal sections of Marin and Santa Cruz Counties. In particular southwest facing beaches, including but not limited to Stinson Beach, Santa Cruz Boardwalk Beach, and Twin Lakes Beach. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$ Sarment
343 WHUS46 KMTR 010302 CFWMTR Coastal Hazard Message National Weather Service San Francisco CA 802 PM PDT Sun Aug 31 2025 CAZ505-509-529-020600- /O.CON.KMTR.BH.S.0013.000000T0000Z-250902T0600Z/ Coastal North Bay Including Point Reyes National Seashore- San Francisco Peninsula Coast-Northern Monterey Bay- 802 PM PDT Sun Aug 31 2025 ...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH MONDAY EVENING... * WHAT...A long period southwesterly swell will result in an increased risk for sneaker waves and rip currents. * WHERE...Coastal North Bay Including Point Reyes National Seashore, San Francisco Peninsula Coast, and Northern Monterey Bay. * WHEN...Through Monday evening. * IMPACTS...Sneaker waves can unexpectedly run significantly farther up the beach than normal, including over rocks and jetties. Rip currents are typically more frequent and stronger in the vicinity of jetties, inlets, and piers. Swimmers should always swim near a lifeguard. * ADDITIONAL DETAILS...Greatest risk will be along southwest facing beaches. Coastal sections of Marin and Santa Cruz Counties. In particular southwest facing beaches, including but not limited to Stinson Beach, Santa Cruz Boardwalk Beach, and Twin Lakes Beach. PRECAUTIONARY/PREPAREDNESS ACTIONS... Remain out of the water to avoid hazardous swimming conditions. && $$ Sarment
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 2:41 AM PDT | Small Craft Advisory | MTR | 5 days | |
| Aug 29, 1:48 PM PDT | Small Craft Advisory | MTR | 7 hr | |
| Aug 29, 1:48 PM PDT | Small Craft Advisory | MTR | 3 days |
Nearby
Beach Hazards Statements in California, 2025Every beach hazards statement in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.