Marine Weather and Tide Forecast for Milpitas, CA

UPDATE
Issued at 502 PM PDT Fri May 1 2026

The forecast appears to be on track. High clouds are passing overhead, with stratus seeping into the coast due to the deepening marine layer. This looks to deepen this evening and overnight, perhaps to 1500 to 2000ft.

SHORT TERM
Issued at 125 PM PDT Fri May 1 2026 (This evening through Saturday)

We'll lose the influence of the upper ridging moving across our area this afternoon by sunset, with a pattern shift to persistent troughing through the weekend into the beginning of next week.
Stratus has mostly retreated back to the coastline with San Francisco and SF Peninsula lagging a little behind early this afternoon. Otherwise expect mostly sunny skies with a layer of thin cirrus for the remainder of the day. As an upper low continues tracking south offshore toward our latitude, we'll see the marine layer continue to gradually increase through the weekend. Stratus development tonight and its intrusion inland will be similar as what we saw last night into this morning. With the slight increase in the depth of the marine layer as well tonight, it should take a little longer to mix out Saturday, into the early afternoon for adjacent inland spots, and potentially linger most if not all day for immediate coastal areas. There is a chance of drizzle along the coast late tonight into Saturday morning with the best chances in higher elevated coastal ranges.

LONG TERM
Issued at 125 PM PDT Fri May 1 2026 (Saturday night through next Thursday)

The increased cloud clover inland and cooler temperatures will lead to a more notable drop in inland high temperatures this weekend, around 5 degrees from todays values on Saturday and another 5 on Sunday, with little change for coastal areas under the continuous influence of the marine layer. As the Rex Block begins to pivot inland, so too will the offshore upper low, beginning to take a more direct path inland on Sunday. The cooling trend will continue into the beginning of next week. By Monday and Tuesday, high temperatures will bottom out to between 5-10 degrees below normal as the system tracks inland into the desert southwest. Unfortunately, this system has continued to trend drier from already anemic moisture offered in guidance earlier this week. As mentioned above, there will be patches of drizzle at times mostly confined to the coast but with no impacts. Wednesday appears to be the beginning of an extended period of warm and dry weather under persistent ridging well beyond the current forecast period.

AVIATION
(06Z TAFS)
Issued at 1041 PM PDT Fri May 1 2026

Widespread stratus is reported across the region with a mix of MVFR- IFR CIGs . Ceilings will lower throughout the night with predominantly IFR CIGs expected. Clearing is likely to occur by late morning/early afternoon before another early return of stratus Saturday evening. Gusty winds return during the afternoon/evening before winds reduce again tomorrow night.

Vicinity of SFO.. MVFR CIGs are expected to persist through the overnight hours before clearing by the early afternoon. Breezy onshore winds return during the afternoon/evening with gusts peaking around 25 knots. Stratus returns early tomorrow evening with MVFR CIGs to prevail tomorrow night.

SFO Bridge Approach....Similar to SFO.

Monterey Bay Terminals.. MVFR to IFR CIGs expected overnight with clearing by late morning/early afternoon. Breezy onshore winds return during the afternoon/evening before dissipating overnight. An early return of stratus is likely again tomorrow night with MVFR CIGs expected.

MARINE
(Tonight through next Thursday)
Issued at 1041 PM PDT Fri May 1 2026

Fresh to strong northwesterly breeze continues into Saturday before winds diminish. Winds will become moderate to fresh late Saturday into Sunday. Moderate, wind driven seas will build to 8 to 10 feet across the northern outer waters through Saturday afternoon. Seas subside late Saturday into Sunday as winds continue to diminish next week.

MTR WATCHES/WARNINGS/ADVISORIES
CA...Beach Hazards Statement from Saturday morning through Sunday evening for CAZ006-505-509-529-530.

PZ...Small Craft Advisory until 9 AM PDT Saturday for Pt Arena to Pt Reyes 0-10 nm.

Small Craft Advisory until 3 PM PDT Saturday for Pt Arena to Pt Reyes 10-60 NM.