Marine Weather and Tide Forecast for North Richmond, CA

SHORT TERM
Issued at 156 PM PDT Wed Jun 17 2026 (This evening through Thursday night)

The marine layer, ~1500ft, continues to retreat back towards the coast, having lingered a bit longer than expected for the San Francisco Bay and into the northern interior valley, bringing slightly cooler high temps for today. Expect the marine layer to push back onshore tonight. Have included drizzle along the coast as the marine layer slightly deepens as the ridge breaks down as troughing pushes east towards the coast. Patchy fog for interior valleys possible as well. The slight cooling trend will continue into Thursday, especially for interior locations, as a result of the troughing and slightly stronger onshore flow, with afternoon highs in the 60s along the coast to mid 70s to 80s for interior locales. The marine layer builds to ~2000kt and expands further inland for tomorrow night, with more fog and drizzle expected.

Tidal flooding continues across low-lying coastal and Bayshore areas through Thursday morning as high astronomical tides combine with surge effects from wind, swell, and thermal expansion to bring us the highest tides of the summer season. High tide is expected to be 1.2 ft above normal (7.1 ft MLLW) at 1:51 AM on Thursday. In addition, the long-period southerly swell continues, which increases the risk for sneaker waves and strong rip currents, with a Beach Hazards Statement out through late Friday night. See the BEACHES section for more information, but the main takeaway is to never turn your back to the ocean!

LONG TERM
Issued at 156 PM PDT Wed Jun 17 2026 (Friday through Wednesday)

The trough will begin to move onshore on Friday and pass over the region through the weekend, with the cooling trend continuing.
Shower and thunderstorm potential associated with the trough will stay primarily over the higher terrain to the north and east of the area as a deep marine layer greatly inhibits any thunderstorm potential. However, there will be enough elevated instability for cumulus development and around a 5% chance of thunderstorms across far northern Napa and Sonoma counties Thursday night and Friday with lower chances to the south.

The marine layer will likely deepen as the trough passes through, with the cooling trend continuing through Saturday. Afternoon highs temps will only reach the 70s to low 80s for interior location and upper 50s to mid 60s along the coast. The onshore flow will continue with breezy afternoon winds. Coastal areas will could continue to see drizzle.

By Sunday, the trough is expected to weaken as model guidance is suggesting a ridge building across the western US into next week.
This will bring a warming trend, beginning Sunday into next week, with a return of some 90s and moderate HeatRisk concerns by midweek for some interior areas.

AVIATION
(18Z TAFS)
Issued at 1233 PM PDT Wed Jun 17 2026

The low stratus layer is currently eroding and widespread VFR conditions prevail through the afternoon at most TAF sites. HAF is the only exception as it will maintain MVFR ceilings until this evening (01Z Thursday) when IFR ceilings develop. Onshore breezes will remain gentle to moderate through the afternoon with wind speeds reaching 10-15kts. High confidence for APC, OAK, and SFO to reach the higher end of wind speeds. The marine layer is set to return this evening as early as 01-02Z Thursday and deepens to around 2000 feet overnight. Low to medium confidence on whether LVK and SJC will develop an MVFR ceiling. It depends on whether the marine layer deepens more than 2000 feet as it did this morning.

Vicinity of SFO...VFR conditions prevail through the afternoon into the evening. Westerly winds around 15 kt increase by the afternoon with some embedded gusts up to 20 kt. Winds ease by 04Z Thursday and coincides with when the marine layer begins to trickle into the surrounding area. MVFR ceilings develop around 07Z and persist through Thursday morning. Medium confidence on timing of stratus as they may roll in an hour or two later. SW winds and gusts increase tomorrow afternoon with an 80% chance for gusts to exceed 18-20 kts.

SFO Bridge Approach...Wind pattern will remain similar to SFO.
Medium confidence (40-50%) on whether MVFR ceilings develop overnight. If a ceiling does form, it may develop a few hours later than SFO (10-11Z Thursday) and will dissipate by 16-17Z Thursday.

Vicinity of OAK and SJC...VFR at both terminals through the afternoon. High confidence MVFR ceilings will impact OAK and become borderline MVFR-IFR overnight before eventually scattering out late Thursday morning. Low confidence on whether SJC will be impacted by the marine layer as it depends on if it deepens past 2000 feet. West to northwest winds increase by the afternoon and ease overnight, with SJC experiencing a land breeze around 09Z Thursday through the end of the TAF period.

Monterey Bay Terminals...VFR with onshore winds expected to increase by the afternoon. MVFR ceilings develop as early as 01Z at SNS followed by a borderline MVFR-IFR deck at MRY around 02Z. Westerly winds ease overnight as these low cloud decks prevail through late Thursday morning.

MARINE
(Tonight through next Monday)
Issued at 156 PM PDT Wed Jun 17 2026

Moderate to fresh west/southwest winds in the bays will diminish around sunset this evening. Winds increase again for the next couple afternoons and evenings with strong breezes anticipated, leading to hazardous conditions for small crafts. Light to moderate seas with southwesterly swell will continue into the weekend. Moderate west/southwest winds and moderate seas will prevail over the open ocean into the weekend.

BEACHES
Issued at 156 PM PDT Wed Jun 17 2026

Long period southerly swell at around 15 to 17 seconds will persist through early Saturday as energetic storms in the Southern Hemisphere continue to affect the California coast, especially for south and southwest facing beaches. Hazardous beach conditions are advertised, specifically for moderate to steeply sloped beaches along the Pacific Coast of the North Bay, San Mateo, Santa Cruz counties. A Beach Hazards Statement for Pacific Coast beaches continues through late Friday night. Be sure to check beach conditions before you head out. Sneaker waves will run up the beach much farther than other waves, potentially catching beachgoers by surprise and resulting in people being swept into the water. Rip currents are strong enough to pull the strongest swimmers away from shore. Swim near a lifeguard if possible. Stay back from the beach, and away from jetties, piers, beachside rocks, and other infrastructure near the water. Never turn your back to the ocean!

MTR WATCHES/WARNINGS/ADVISORIES
CA...Beach Hazards Statement through late Friday night for CAZ006-505- 509-529-530.

Coastal Flood Advisory until 5 AM PDT Thursday for CAZ006-506- 508.

PZ...Small Craft Advisory from 3 PM to 9 PM PDT Thursday for Mry Bay- SF Bay N of Bay Bridge.