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Marine Weather and Tide Forecast for Walnut Creek, CA

April 21, 2025 4:37 AM PDT (11:37 UTC) Change Location
Sunrise 6:22 AM   Sunset 7:51 PM
Moonrise 2:03 AM   Moonset 11:56 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

Marine Forecasts
   
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NOTE: Zones were updated 3/20/2025
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 250 Am Pdt Mon Apr 21 2025

Today - SW wind around 5 kt, veering to W late. Waves around 2 ft or less.

Tonight - SW wind 5 to 10 kt, easing to around 5 kt after midnight. Waves around 2 ft or less.

Tue - SW wind around 5 kt, rising to 5 to 10 kt in the afternoon. Waves around 2 ft or less.

Tue night - SW wind 5 to 10 kt. Waves around 2 ft or less.

Wed - SW wind 5 to 10 kt. Waves around 2 ft or less.

Wed night - SW wind 5 to 10 kt. Waves around 2 ft or less.

Thu - SW wind 5 to 10 kt, rising to 10 to 15 kt in the afternoon. Waves around 2 ft or less.

Thu night - W wind 10 to 15 kt. Waves around 2 ft or less.

Fri - W wind 10 to 15 kt. Waves around 2 ft or less.

Fri night - W wind 10 to 15 kt. Waves around 2 ft or less.
PZZ500 250 Am Pdt Mon Apr 21 2025

Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
north to northwest winds continue to increase in the northern outer waters along with building north swell. Winds look to increase and spread across the outer waters into the work week. The gusty occasionally gale force northerly winds in the afternoon look to become more widespread into the mid week.

7 Day Forecast for Marine Location Near Walnut Creek, CA
   
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Tide / Current for Suisun Point, Carquinez Strait, California
  
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Suisun Point
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Mon -- 02:29 AM PDT     2.40 feet Low Tide
Mon -- 03:03 AM PDT     Moonrise
Mon -- 06:24 AM PDT     Sunrise
Mon -- 07:41 AM PDT     4.35 feet High Tide
Mon -- 12:56 PM PDT     Moonset
Mon -- 03:45 PM PDT     -0.04 feet Low Tide
Mon -- 07:50 PM PDT     Sunset
Mon -- 10:43 PM PDT     3.95 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Suisun Point, Carquinez Strait, California does not exist in database. Press Edit above and select a valid nearby location.

Suisun Point, Carquinez Strait, California, Tide feet
12
am
3.1
1
am
2.7
2
am
2.4
3
am
2.4
4
am
2.7
5
am
3.3
6
am
3.9
7
am
4.3
8
am
4.3
9
am
4.1
10
am
3.5
11
am
2.7
12
pm
1.8
1
pm
1
2
pm
0.4
3
pm
0.1
4
pm
-0
5
pm
0.3
6
pm
0.9
7
pm
1.8
8
pm
2.6
9
pm
3.3
10
pm
3.8
11
pm
3.9

Tide / Current for Roe Island S, Suisun Bay, California Current
  
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Roe Island S
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Mon -- 12:17 AM PDT     -0.00 knots Slack
Mon -- 02:33 AM PDT     -0.80 knots Max Ebb
Mon -- 03:03 AM PDT     Moonrise
Mon -- 05:14 AM PDT     0.00 knots Slack
Mon -- 06:23 AM PDT     Sunrise
Mon -- 07:32 AM PDT     0.60 knots Max Flood
Mon -- 10:14 AM PDT     -0.00 knots Slack
Mon -- 12:56 PM PDT     Moonset
Mon -- 01:54 PM PDT     -2.15 knots Max Ebb
Mon -- 06:26 PM PDT     0.00 knots Slack
Mon -- 07:50 PM PDT     Sunset
Mon -- 09:41 PM PDT     0.80 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Roe Island S, Suisun Bay, California Current does not exist in database. Press Edit above and select a valid nearby location.

Roe Island S, Suisun Bay, California Current, knots
12
am
0.1
1
am
-0.4
2
am
-0.7
3
am
-0.8
4
am
-0.6
5
am
-0.1
6
am
0.3
7
am
0.6
8
am
0.6
9
am
0.4
10
am
0.1
11
am
-0.6
12
pm
-1.4
1
pm
-2
2
pm
-2.1
3
pm
-2
4
pm
-1.7
5
pm
-1.1
6
pm
-0.4
7
pm
0.3
8
pm
0.6
9
pm
0.8
10
pm
0.8
11
pm
0.7

Area Discussion for San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 210833 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA 133 AM PDT Mon Apr 21 2025

New SYNOPSIS, SHORT TERM, LONG TERM

SYNOPSIS
Issued at 1231 AM PDT Mon Apr 21 2025

Inland areas will be warmer than normal through Tuesday before flipping to cooler than normal late week.

SHORT TERM
(Today and tonight)
Issued at 1231 AM PDT Mon Apr 21 2025

With weak zonal flow aloft, the weather is pretty benign today.
The Ft. Ord profiler is measuring the marine layer at 1,500 feet tonight. As a result, the coastal stratus deck extends into the San Francisco Bay and through the majority of the Salinas Valley.
These clouds will mix out by noon before what should be an beautiful afternoon. High temperatures are expected to approach 80 degrees in the warmer inland areas such as Santa Rosa, Livermore, and San Jose. That's about 5-10 degrees above normal, but no where near record territory. Despite the clouds mixing out, coastal areas will remain in the cooler marine layer air, with more seasonal temperatures generally in the 60s.

LONG TERM
(Tuesday through Sunday)
Issued at 1231 AM PDT Mon Apr 21 2025

Tuesday will start with less clouds than Monday as the marine layer compresses to around 500 feet. Otherwise the warmer temperatures will continue Tuesday afternoon, although an evening breeze will bring more of a chill as the sun goes down. In the upper levels, a moderate trough will move through far northern California late Tuesday - Wednesday. At the same time, the warm thickness tongue across California will smooth out causing surface temperatures to drop fairly significantly Wednesday. With more upper level moisture resulting in high cloud cover, additional cooling is expected Thursday, by which point temperatures will be roughly roughly 5-10 degrees lower than normal. A deeper trough approaches the coast on Friday. There is still some uncertainty regarding the timing and strength of this system, but the overall trend has been drier over the last couple days of model data. There's still a slight to moderate chance of very light rain Fri- Sat, but the chance for more significant rain >0.1" is currently only around 20% according to the NBM. Whether it rains or not, this system will likely bring some stronger onshore winds, with gusts up to 20 or 30 mph at times. The influence of this trough will likely extend into early next week before ridging returns.

AVIATION
(06Z TAFS)
Issued at 927 PM PDT Sun Apr 20 2025

Stratus and fog /MVFR-IFR/ continues along the coast from Point Sur to the vicinity of Point Reyes per satellite imagery. Drier air flow continues to advect southward over the northern coastal waters. Recent HRRR output has followed this pattern fairly closely, showing additional clearing taking place through the evening to the south of Point Reyes. Surface winds are forecast to become weakly cyclonic over the inner waters tonight and Monday morning, the wind field and radiational cooling aloft becoming a focus for regrowth of stratus and fog. Onshore winds will locally bring stratus and fog /MVFR-IFR/ inland. The marine layer depth has compressed to around 1200 feet per recent profiler data and spot checking coastal temperatures. A thinner marine layer will help speed up stratus and fog mix out times Monday morning.

Vicinity of SFO...VFR, then MVFR stratus ceiling forecast 09z early Monday, mixing out to VFR 17z Monday. West-northwest decreasing to a light west wind then shifting to light northeast wind Monday morning. West-northwest wind resuming Monday afternoon with gusts near 20 knots until early evening.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...Satellite imagery shows stratus /MVFR-IFR/ filled in across the Monterey Bay. The marine layer depth at the Fort Ord profiler has recently varied between 1200 and 1400 feet.
HRRR output shows stratus and fog filling into the Salinas Valley tonight and Monday morning. Stratus and fog /MVFR-IFR/ mix out by around noon Monday. Onshore winds mainly continuing during the period between 5 and 15 knots.

MARINE
(Tonight through next Saturday)
Issued at 853 PM PDT Sun Apr 20 2025

Breezy to gusty north to northwest winds are building in the northern waters along with building north swell. Winds look to increase and spread across the outer waters into the work week.
The gusty occasionally gale force northerly winds in the afternoon look to become more widespread into the mid week.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Small Craft Advisory until 3 AM PDT early this morning for Pt Arena to Pt Reyes 0-10 nm.

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


Weather Reporting Stations
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Wind History for Martinez-Amorco Pier, CA
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Airport Reports
   
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Weather Map
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GEOS Local Image of Central West Coast  
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Sacramento, CA,





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