San Mateo Point to the Mexican Border from 30 to 60 nm out including San Clemente Island Marine Forecast
| Tonight...Wind Nw 10 Kt. Seas 3 To 5 Ft. Wave Detail: Nw 2 Ft At 4 Seconds, W 4 Ft At 12 Seconds And S 1 Foot At 14 Seconds. |
| Thu...Wind Nw 10 To 15 Kt With Gusts To 20 Kt. Seas 4 To 6 Ft. Wave Detail: Nw 3 Ft At 4 Seconds, Nw 4 Ft At 7 Seconds And S 1 Foot At 16 Seconds. |
| Thu Night...Wind W 10 To 15 Kt. Seas 3 To 5 Ft. Wave Detail: Nw 2 Ft At 4 Seconds, Nw 4 Ft At 7 Seconds And S 1 Foot At 17 Seconds. |
| Fri...Wind Variable Less Than 10 Kt...Becoming Nw 10 Kt In The Afternoon. Seas 4 To 6 Ft. Wave Detail: Nw 1 Foot At 4 Seconds, W 4 Ft At 12 Seconds And S 1 Foot At 15 Seconds. |
| Fri Night...Wind W 10 Kt. Seas 4 To 6 Ft. Wave Detail: W 1 Foot At 4 Seconds, W 4 Ft At 12 Seconds And S 1 Foot At 16 Seconds. |
| Sat...Wind Variable Less Than 10 Kt. Seas 4 To 6 Ft. Wave Detail: W 4 Ft At 13 Seconds And S 2 Ft At 15 Seconds. |
| Sat Night...Wind Variable Less Than 10 Kt. Seas 3 To 5 Ft. Wave Detail: Nw 1 Foot At 4 Seconds, W 4 Ft At 12 Seconds And S 2 Ft At 15 Seconds. |
| Sun...Wind Variable Less Than 10 Kt. Seas 3 To 5 Ft. Wave Detail: W 4 Ft At 12 Seconds And S 2 Ft At 14 Seconds. |
| Sun Night...Wind Variable Less Than 10 Kt. Seas 3 To 4 Ft. Wave Detail: Nw 1 Foot At 4 Seconds, W 3 Ft At 12 Seconds And S 2 Ft At 14 Seconds. |
| Mon...Wind Variable Less Than 10 Kt. Seas 3 To 4 Ft. Wave Detail: W 1 Foot At 4 Seconds, S 2 Ft At 14 Seconds And W 3 Ft At 15 Seconds. |
| Mon Night...Wind Variable Less Than 10 Kt. Seas 3 To 4 Ft. Wave Detail: W 1 Foot At 4 Seconds, W 2 Ft At 14 Seconds And S 2 Ft At 14 Seconds. |
| Area Forecast Discussion National Weather Service San Diego CA 131pm PDT Wednesday September 23 2026 Synopsis Warmer conditions through Saturday with moderate HeatRisk for the coast and western valleys on Friday and Saturday. Night and morning low clouds and fog will stay confined to the coastal areas for the next few nights. There is a a slight chance of showers and isolated thunderstorms over the mountains Thursday afternoon. Cooler conditions expected Sunday and Monday, with potentially warmer conditions next Tuesday. For Extreme Southwestern California Including Orange... San Diego...Western Riverside and Southwestern San Bernardino Counties Temperatures at 1pm were running 10 to 18 degrees warmer than yesterday in the Inland Empire, 5 to 7 degrees warmer than yesterday for other inland locations, and were within a few degrees of yesterday for the coast. Most locations will see an increase in temperatures each day through Saturday, with high temperatures 5 to 7 degrees above average for inland locations and 7 to 12 degrees above average for the coast. Overnight lows will increase to the mid- 60s to 70 west of the mountains and in the upper 70s to low 80s in the low desert. Moderate HeatRisk is expected along the coast Friday and Saturday and in the low deserts for the second half of the week. Moderate HeatRisk has the most impacts on those sensitive to heat, especially those without cooling/hydration. For Thursday, a closed low lingering to our south will start to move east. This low will draw moisture into Southern California from the southeast increasing chances for precipitation, mainly in the mountains. Latest high resolutions guidance indicates rainfall rates will mostly be 0.20-0.30 inches per hour, where thunderstorms develop rates could be closer to 0.50 inches per hour. There remains a 5-10% chance of thunderstorms over the mountains with the higher chances over the San Diego and Riverside County mountains. For Sunday, an incoming trough of low pressure is expected to move inland across northern California. The low will dig south Monday and be to our east Tuesday or early Wednesday. There is good agreement that temperatures will cool 3 to 8 degrees between Saturday and Sunday and another 2 to 4 degrees for Monday. Additionally cloud coverage will increase. The trough looks like it will pull in moisture from our southwest, but there remains uncertainty in how much moisture will actually get pulled into Southern California. Ensemble members from both the GFS (Global Forecast System) and ECMWF (European Centre for Medium-Range Weather Forecasts) are showing increases in precipitable water and some potential for precipitation. For next Tuesday and Wednesday, the forecast solutions diverge with 60% of solutions showing ridging and 40% maintaining weak troughing. Current forecast follows the NBM and shows a few degrees of warming each day Tuesday and Wednesday. Marine No hazardous marine conditions are expected through Monday. Beaches The combination of a 3 foot swell from 190 degrees on Sunday shifting to 160 degrees for Monday and Tuesday with a 12 to 15 second period coinciding with our bimonthly elevated high tides will increase chances for coastal flooding and erosion. Predicted high tides of 6.5 and 7.0 ft MSL will occur between 10 and 11am Sunday through Tuesday. The listed tide predictions have been corrected to reflect current trends in actual tide observations. Surf will be elevated, especially for south facing beaches with sets up to 5 feet on Sunday. Surf heigheights and direction of the swell remain uncertain for Monday and Tuesday and will be most influenced by the track of Tropical Cyclone Polo. Skywarn Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions. NOAA San Diego CA Office: Watches - Warnings - Advisories CA...None. PZ...None. |
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