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Marine Weather and Tide Forecast for Half Moon Bay, CA

April 25, 2025 7:00 PM PDT (02:00 UTC)
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Sunrise 6:19 AM   Sunset 7:55 PM
Moonrise 4:00 AM   Moonset 4:46 PM 
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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
PZZ531 San Francisco Bay South Of The Bay Bridge- 302 Pm Pdt Fri Apr 25 2025

Tonight - W wind 5 to 10 kt. Waves around 2 ft or less.

Sat - W wind 5 to 10 kt. Waves around 2 ft or less.

Sat night - W wind 10 to 15 kt. Waves around 2 ft or less. A chance of rain.

Sun - W wind 5 to 10 kt. Waves around 2 ft or less.

Sun night - W wind 5 to 10 kt, becoming sw after midnight. Waves around 2 ft or less.

Mon - Light and variable winds, becoming W 5 to 10 kt in the afternoon. Waves around 2 ft or less.

Mon night - W wind 5 to 10 kt, becoming sw after midnight. Waves around 2 ft or less.

Tue - Light and variable winds, becoming W around 5 kt in the afternoon. Waves around 2 ft or less.

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

Wed - SW wind around 5 kt, veering to W in the afternoon. Waves around 2 ft or less.

Wed night - W wind 5 to 10 kt. Waves around 2 ft or less.
PZZ500 302 Pm Pdt Fri Apr 25 2025

Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
scattered showers across the coastal waters and bays will continue today through early Sunday morning. Rough seas will develop Saturday across the northern coastal waters with gusty north winds. Drier more stable high pressure builds in across the region for next week.

7 Day Forecast for Marine Location Near Half Moon Bay, CA
   
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Tide / Current for Half Moon Bay, California
  
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Half Moon Bay
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Fri -- 03:21 AM PDT     0.48 feet Low Tide
Fri -- 05:00 AM PDT     Moonrise
Fri -- 06:21 AM PDT     Sunrise
Fri -- 09:27 AM PDT     4.67 feet High Tide
Fri -- 03:18 PM PDT     0.66 feet Low Tide
Fri -- 05:46 PM PDT     Moonset
Fri -- 07:54 PM PDT     Sunset
Fri -- 09:37 PM PDT     5.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Half Moon Bay, California does not exist in database. Press Edit above and select a valid nearby location.

Half Moon Bay, California, Tide feet
12
am
3.1
1
am
1.9
2
am
1
3
am
0.5
4
am
0.6
5
am
1.2
6
am
2.2
7
am
3.2
8
am
4.1
9
am
4.6
10
am
4.6
11
am
4.1
12
pm
3.1
1
pm
2
2
pm
1.1
3
pm
0.7
4
pm
0.8
5
pm
1.5
6
pm
2.6
7
pm
3.8
8
pm
4.9
9
pm
5.6
10
pm
5.6
11
pm
5.1

Tide / Current for San Mateo Bridge, South San Francisco Bay, California Current
  
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San Mateo Bridge
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Fri -- 03:12 AM PDT     -1.71 knots Max Ebb
Fri -- 04:59 AM PDT     Moonrise
Fri -- 06:18 AM PDT     0.01 knots Slack
Fri -- 06:20 AM PDT     Sunrise
Fri -- 09:04 AM PDT     1.88 knots Max Flood
Fri -- 12:27 PM PDT     -0.00 knots Slack
Fri -- 03:32 PM PDT     -1.57 knots Max Ebb
Fri -- 05:45 PM PDT     Moonset
Fri -- 06:28 PM PDT     0.00 knots Slack
Fri -- 07:54 PM PDT     Sunset
Fri -- 09:14 PM PDT     1.90 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, San Mateo Bridge, South San Francisco Bay, California Current does not exist in database. Press Edit above and select a valid nearby location.

San Mateo Bridge, South San Francisco Bay, California Current, knots
12
am
-0
1
am
-0.8
2
am
-1.4
3
am
-1.7
4
am
-1.5
5
am
-1
6
am
-0.3
7
am
0.7
8
am
1.6
9
am
1.9
10
am
1.7
11
am
1.2
12
pm
0.4
1
pm
-0.4
2
pm
-1.1
3
pm
-1.5
4
pm
-1.5
5
pm
-1.1
6
pm
-0.4
7
pm
0.5
8
pm
1.4
9
pm
1.9
10
pm
1.8
11
pm
1.3

Area Discussion for San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 251959 AFDMTR

Area Forecast Discussion National Weather Service San Francisco CA Issued by National Weather Service Eureka CA 1259 PM PDT Fri Apr 25 2025

New SYNOPSIS, SHORT TERM, LONG TERM

SYNOPSIS
Issued at 1247 PM PDT Fri Apr 25 2025

Cool, cloudy, and for some, rainy conditions are forecast over the next 24 hours. Significant impacts due to rain or isolated storms are not anticipated. Some mountain top snow is also forecast across the Santa Lucia Range. Sunday and into next week appear rain-free with a slight warming trend. Thereafter, the upper air pattern may support opportunities for light rain next weekend.

SHORT TERM
(This afternoon through Saturday Night)
Issued at 1247 PM PDT Fri Apr 25

-Short Term Key Messages *Cool and cloudy conditions *Showers and isolated thunderstorm chances *Mountain top light snow

Showers will continue this afternoon and evening across southern portions of the Bay Area as well as the Central Coast. The primary culprit appears to be a couple of PV anomalies along the 2PVU surface rotating around the main upper low/trough. Rain will still remain on the "lighter" end and 12 hour rainfall amounts have largely tallied around a few hundredths of an inch across the region.

As the main upper trough digs southward, we'll see a re-invigoration of marine showers that will slide eastward. Guidance has been rather insistent on the Big Sur Coastline being the favored region for convection and given the range in the forecast, I'll nudge PoPs upward. As the upper low continues to pinwheel down the Central Coast, some modest 850-700mb WAA or trough of warm air aloft may result in some precipitation across the North Bay early Saturday morning. Currently, the greatest PoPs reside down across the Central Coast with rain chances ranging from 60-70% with PoPs around 30-50% across the North Bay. This leaves the heart of the Bay Area in a minimum PoP wise, but even here, a few sprinkles or light showers will remain possible (albeit around 20%).

As far as the potential for isolated thunderstorms, this remains a possibility, though the probability is diminishing. Forecast soundings indicate lapse rates may not be quite as steep (likely do to some slight shifts in the location of the coldest air aloft), but still supportive of more vigorous showers with a few isolated lightning strikes. For now, have confined the risk for a few storms to southern Monterey and San Benito counties. At this time, widespread severe weather is not anticipated, but brief bouts of accumulating hail may result in slick driving conditions.

There still remains an opportunity for some snow across the higher terrain of the Santa Lucia Range and potentially portions of the Diablo Range. Overall, not anticipating much in the way of significant impacts due to snow.



LONG TERM
(Sunday through next Thursday)
Issued at 1247 PM PDT Fri Apr 25 2025

-Long Term Key Messages *Lingering rain chances on Sunday Morning *Modest warming trend, 'Minor' HeatRisk next week

A slight change to the long term forecast and there now remains a potential (20-30% chance ) for lingering precipitation after sunrise Sunday. As the upper low departs, large scale ascent should ramp down. However, low level moisture remains plentiful and there's still an opportunity for largely light drizzle with some breezy conditions (10-20 mph wind gusts) as the surface pressure gradient remains a little tight.

Longer term model projections support a handful of days that will be dominated by shortwave ridging. This will mean a gradual warming trend, with "minor" HeatRisk returning. This type of heat isn't overly impactful, except to those that are exceptionally sensitive to heat (very young and elderly). As we progress into the first weekend of May, there are some signs that the pattern evolve such that a couple of upper troughs slide through the area. This may mean additional rain chances in the day 8-10 time frame according to a couple of the ensemble clusters. For now, we'll hold serve with a largely rain-free forecast given the time of year and the consensus of a dry period among a majority of the NWP. Of course, early May rains will be beneficial as it pertains to delaying the start of our dry/spring fire season.

AVIATION
(18Z TAFS)
Issued at 1110 AM PDT Fri Apr 25 2025

Low pressure spins offshore leaving much of the area with VFR cigs, though a few areas have seen cigs fall to MVFR for a few hours. This should generally remain the trend for the forecast period, unless a shower moves over the region. Tomorrow morning, when rain chances look to pick up, we may see longer stretches of MVFR for terminals around KSFO and down the Central Coast, though confidence is low on timing and exact locations of showers.

Vicinity of SFO...VFR conditions should prevail through much of the day, with VCSH being possible through the evening. Showers should start to increase by Saturday morning and perhaps bring a brief period of MVFR conditions. Conditions look to improve mid to late morning with VFR conditions prevailing through the day.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...Similar story as the rest of the TAF sites, though Monterey Bay Terminals likely have the best shots of showers through the forecast period and into Saturday. Generally VFR conditions will prevail, though MVFR conditions will be possible with any stronger showers that move through. There is a small chance for thunderstorms for the southern half of Monterey and San Benito counties.

MARINE
(Today through Wednesday)
Issued at 842 AM PDT Fri Apr 25 2025

A chilly upper level low arriving from the northwest will result in scattered showers across the coastal waters and bays today through Sunday morning. Gusty northwest winds and rough seas return across the northern outer coastal waters late Saturday. Dry weather returns early next week due to an eastward moving high pressure system over the Pacific.

MTR WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...Small Craft Advisory from 3 PM to 9 PM PDT Saturday for Pt Arena to Pt Reyes 10-60 NM.


Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
RTYC1 - 9414523 - Redwood City, CA 14 mi42 min0G1.9 53°F 63°F29.95
46237 - San Francisco Bar, CA (142) 23 mi30 min 53°F 55°F4 ft
AAMC1 - 9414750 - Alameda, CA 23 mi42 minWSW 7G8.9 55°F 60°F29.96
FTPC1 - 9414290 - San Francisco, CA 23 mi42 minSW 7G11 54°F 29.95
PXOC1 - 9414311 - San Francisco (Pier 1), CA 23 mi42 minWSW 4.1G9.9 55°F 29.93
PXSC1 23 mi42 min 55°F 45°F
OBXC1 24 mi42 min 54°F 45°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 24 mi42 minWSW 9.9G11
LNDC1 25 mi42 minWSW 8G12 55°F 29.95
OKXC1 - 9414776 - Oakland (Berth 34), CA 25 mi42 minWNW 9.9G12 54°F 29.95
TIBC1 - Tiburon Pier, San Francisco Bay, CA 29 mi106 minWSW 1.9 53°F 29.9443°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 31 mi42 minW 9.9G12 55°F 29.96
RCMC1 - 9414863 - Richmond, CA 32 mi42 minSW 4.1G8 54°F 58°F29.94
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 42 mi42 minSW 13G16 55°F 29.93
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi42 minWSW 15G17 56°F 62°F29.9344°F
UPBC1 44 mi42 minW 17G20
PRYC1 - 9415020 - Point Reyes, CA 45 mi42 min 29.95
46284 47 mi30 min 54°F 56°F2 ft
PCOC1 - 9415144 - Port Chicago, CA 47 mi42 minWSW 9.9G15 57°F 29.93


Wind History for Redwood City, CA
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Airport Reports
   
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KHAF HALF MOON BAY,CA 3 sm25 minSW 048 smPartly Cloudy54°F46°F77%29.96
KSFO SAN FRANCISCO INTL,CA 12 sm64 minW 0610 smOvercast57°F39°F51%29.95
KSQL SAN CARLOS,CA 12 sm70 mincalm10 smOvercast Lt Rain 54°F46°F77%29.96
KPAO PALO ALTO,CA 19 sm13 minvar 0310 smMostly Cloudy Showers in Vicinity 54°F46°F77%29.95
KOAK METROPOLITAN OAKLAND INTL,CA 22 sm7 minSW 1110 smMostly Cloudy54°F43°F67%29.95
KHWD HAYWARD EXECUTIVE,CA 23 sm66 minWSW 0610 smOvercast57°F39°F51%29.95
KNUQ MOFFETT FEDERAL AFLD,CA 23 sm45 mincalm10 smOvercast54°F45°F71%29.95

Weather Map
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GEOS Local Image of Central West Coast  
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San Francisco Bay Area, CA,





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