Marine Weather and Tide Forecast for Half Moon Bay, CA
February 8, 2025 10:45 AM PST (18:45 UTC) Change Location
![]() | Sunrise 7:04 AM Sunset 5:42 PM Moonrise 1:43 PM Moonset 4:36 AM |
PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 742 Am Pst Sat Feb 8 2025
.small craft advisory in effect through late tonight - .
Today - NW wind 10 to 15 kt. Seas 5 to 7 ft. Wave detail: nw 6 ft at 8 seconds and sw 2 ft at 12 seconds.
Tonight - N wind 15 to 20 kt, easing to 10 to 15 kt after midnight. Seas 4 to 6 ft. Wave detail: nw 5 ft at 8 seconds.
Sun - N wind 5 to 10 kt. Seas 4 to 6 ft. Wave detail: W 5 ft at 9 seconds.
Sun night - NW wind 5 to 10 kt. Seas 4 to 6 ft. Wave detail: W 6 ft at 10 seconds.
Mon - N wind around 5 kt, backing to nw in the afternoon. Seas 4 to 6 ft. Wave detail: W 6 ft at 10 seconds.
Mon night - NW wind 10 to 15 kt, rising to 15 to 20 kt after midnight. Seas 5 to 7 ft. Wave detail: W 6 ft at 9 seconds.
Tue - NW wind 15 to 20 kt. Seas 5 to 7 ft. Wave detail: W 6 ft at 9 seconds. A chance of drizzle in the afternoon.
Tue night - NW wind 10 to 15 kt, easing to 5 to 10 kt after midnight. Seas 4 to 6 ft. Wave detail: nw 5 ft at 8 seconds. A chance of rain and drizzle in the evening, then rain likely after midnight.
Wed - E wind around 10 kt, veering to se in the afternoon. Seas 3 to 4 ft. Wave detail: W 4 ft at 7 seconds and sw 2 ft at 8 seconds. Rain.
Wed night - S wind 15 to 20 kt. Seas 4 to 6 ft. Wave detail: sw 5 ft at 10 seconds and W 3 ft at 15 seconds. Rain.
- .san francisco bar/fourfathom bank forecast - - .
in the deep water channel - .mixed seas of 6 to 8 ft at 10 seconds.
across the bar - .mixed seas of 8 to 11 ft at 14 seconds. Maximum ebb current of 3.0 kt at 12:37 pm Saturday and 1.4 kt at 01:45 am Sunday.
in the deep water channel - .mixed seas of 6 to 8 ft at 10 seconds.
across the bar - .mixed seas of 8 to 11 ft at 14 seconds. Maximum ebb current of 3.0 kt at 12:37 pm Saturday and 1.4 kt at 01:45 am Sunday.
PZZ500 742 Am Pst Sat Feb 8 2025
Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
strong northerly winds will prevail through Tuesday with the bays remaining sheltered from the strongest gusts. Significant wave heights will remain in the moderate to rough realm. An approaching low will bring rain Tuesday night through Friday morning.
strong northerly winds will prevail through Tuesday with the bays remaining sheltered from the strongest gusts. Significant wave heights will remain in the moderate to rough realm. An approaching low will bring rain Tuesday night through Friday morning.

NEW! Add second zone forecast
Half Moon Bay Click for Map Sat -- 12:33 AM PST 3.30 feet Low Tide Sat -- 04:36 AM PST Moonset Sat -- 06:27 AM PST 6.04 feet High Tide Sat -- 07:06 AM PST Sunrise Sat -- 01:42 PM PST Moonrise Sat -- 02:05 PM PST -0.60 feet Low Tide Sat -- 05:42 PM PST Sunset Sat -- 09:09 PM PST 4.50 feet High Tide Tide / Current data from XTide NOT FOR NAVIGATION |   |
Half Moon Bay, California, Tide feet
12 am |
3.3 |
1 am |
3.3 |
2 am |
3.7 |
3 am |
4.2 |
4 am |
4.9 |
5 am |
5.6 |
6 am |
6 |
7 am |
6 |
8 am |
5.4 |
9 am |
4.4 |
10 am |
3 |
11 am |
1.6 |
12 pm |
0.4 |
1 pm |
-0.3 |
2 pm |
-0.6 |
3 pm |
-0.4 |
4 pm |
0.2 |
5 pm |
1.1 |
6 pm |
2.2 |
7 pm |
3.3 |
8 pm |
4.1 |
9 pm |
4.5 |
10 pm |
4.4 |
11 pm |
4 |
San Mateo Bridge Click for Map Sat -- 01:16 AM PST -0.57 knots Max Ebb Sat -- 03:39 AM PST 0.00 knots Slack Sat -- 04:35 AM PST Moonset Sat -- 06:23 AM PST 1.14 knots Max Flood Sat -- 07:05 AM PST Sunrise Sat -- 09:23 AM PST -0.01 knots Slack Sat -- 01:18 PM PST -1.86 knots Max Ebb Sat -- 01:41 PM PST Moonrise Sat -- 04:54 PM PST 0.01 knots Slack Sat -- 05:41 PM PST Sunset Sat -- 08:00 PM PST 1.84 knots Max Flood Sat -- 11:31 PM PST -0.01 knots Slack Tide / Current data from XTide NOT FOR NAVIGATION |   |
San Mateo Bridge, South San Francisco Bay, California Current, knots
12 am |
-0.5 |
1 am |
-0.6 |
2 am |
-0.5 |
3 am |
-0.3 |
4 am |
0.2 |
5 am |
0.8 |
6 am |
1.1 |
7 am |
1.1 |
8 am |
0.8 |
9 am |
0.3 |
10 am |
-0.4 |
11 am |
-1.1 |
12 pm |
-1.6 |
1 pm |
-1.8 |
2 pm |
-1.8 |
3 pm |
-1.5 |
4 pm |
-0.8 |
5 pm |
0.1 |
6 pm |
1 |
7 pm |
1.6 |
8 pm |
1.8 |
9 pm |
1.7 |
10 pm |
1.1 |
11 pm |
0.4 |
Area Discussion for San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 081718 AFDMTR
Area Forecast Discussion National Weather Service San Francisco CA 918 AM PST Sat Feb 8 2025
New AVIATION
SYNOPSIS
Issued at 1207 AM PST Sat Feb 8 2025
Mostly clear skies and cold mornings will persist through early next week. The colder inland areas will drop below freezing each night.
An atmospheric river will bring significant rain from Wednesday- Thursday.
UPDATE
Issued at 857 AM PST Sat Feb 8 2025
This morning's frost and freeze products are allowed to expire at 9AM. No other changes to the forecast were made at this time.
SHORT TERM
(Today and tonight)
Issued at 1207 AM PST Sat Feb 8 2025
The GOES West night fog product shows mostly clear skies across the Bay Area, with some patches of stratus over the Central Coast. The clear skies are allowing enhanced radiational cooling, and several inland areas are already in the 30s. As the temperature drops to the dew point, the rate of cooling will likely slow through the morning, although the air mass is also on a drying trend, so this moderating effect won't be as pronounced as normal. Overall the observed temperature is matching the hourly forecast well and the frost/freeze products remain unchanged.
After the sun comes up, the clear skies will allow temperature will begin to climb, but we'll only reach the mid-50s this afternoon for most populated areas. Higher terrain won't get out of the 40s.
LONG TERM
(Sunday through Friday)
Issued at 1207 AM PST Sat Feb 8 2025
Why is it getting so cold? After all the deep air mass isn't that cold. The 850 mb temperature is only in the 10-25th percentile this weekend. This cooling is driven more by dry air supporting enhanced radiational cooling. As the surface dew points drop into the 20s-30s under clear skies, there is nothing to slow down nocturnal cooling. Lower level winds will shift to light offshore Sunday, causing the air mass to dry further. The PWAT looks very likely to drop below 0.2", which is in the bottom 2% for February. This very dry air mass will continue to support clear skies and very cold mornings through early next week. Sunday and Monday look to be the coldest. Our official forecast brings downtown San Francisco to 39 Monday morning. That mark is roughly 10 degrees below normal, and has only been reached 3 times in the last decade (2/23/23, 2/24/23, 3/1/23). Meanwhile San Jose has a 60% chance of dropping below freezing for the first time since 2017.
Everything changes on Wednesday. The winds will shift from northerly to southerly as low pressure system moves over the Pacific Northwest. An associated warm front and cold front will both push through California, bringing a prolonged period of moderate to occasionally heavy rain that will linger into Friday.
The heaviest period currently looks to be from late Wednesday through late Thursday, when 1-3" of rain is expected in the lowlands with more in the coastal mountains. This will likely cause some flooding issues for urban environments and smaller streams. The USGS has also informed us that soil moisture sensors are indicating shallow landslides are likely if the rain rates get high enough. This system will also bring some wind, though with the actual low pressure center much further north than the most recent storm, the pressure gradient and wind potential are somewhat lower. Things currently look to dry out Friday before a dry weekend, but that's not a guarantee as the uncertainty remains high.
AVIATION
(18Z TAFS)
Issued at 917 AM PST Sat Feb 8 2025
High confidence VFR through the TAF period for most terminals except KLVK, where LIFR conditions continue. Fog should clear up shortly after 18Z. Winds will remain relatively light to moderate through the TAF period.
Vicinity of SFO...High confidence VFR with light to moderate winds through the TAF period.
SFO Bridge Approach...Similar to SFO.
Monterey Bay Terminals...VFR through the TAF period. Winds will have southerly direction overnight. but speeds will remain mostly light to moderate through the TAF period.
MARINE
(Today through Thursday)
Issued at 857 AM PST Sat Feb 8 2025
Strong northerly winds will prevail through Tuesday with the bays remaining sheltered from the strongest gusts. Significant wave heights will remain in the moderate to rough realm. An approaching low will bring rain Tuesday night through Friday morning.
MTR WATCHES/WARNINGS/ADVISORIES
CA...Frost Advisory from 1 AM to 9 AM PST Sunday for CAZ502>504-508- 510-512-513-528>530.
Freeze Warning from 1 AM to 9 AM PST Sunday for CAZ506-514>518.
PZ...Small Craft Advisory until 3 AM PST Sunday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Arena to Pt Reyes 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm.
Small Craft Advisory until 9 PM PST Sunday for Pt Pinos to Pt Piedras Blancas 0-10 nm.
Small Craft Advisory until 9 AM PST Monday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM.
Area Forecast Discussion National Weather Service San Francisco CA 918 AM PST Sat Feb 8 2025
New AVIATION
SYNOPSIS
Issued at 1207 AM PST Sat Feb 8 2025
Mostly clear skies and cold mornings will persist through early next week. The colder inland areas will drop below freezing each night.
An atmospheric river will bring significant rain from Wednesday- Thursday.
UPDATE
Issued at 857 AM PST Sat Feb 8 2025
This morning's frost and freeze products are allowed to expire at 9AM. No other changes to the forecast were made at this time.
SHORT TERM
(Today and tonight)
Issued at 1207 AM PST Sat Feb 8 2025
The GOES West night fog product shows mostly clear skies across the Bay Area, with some patches of stratus over the Central Coast. The clear skies are allowing enhanced radiational cooling, and several inland areas are already in the 30s. As the temperature drops to the dew point, the rate of cooling will likely slow through the morning, although the air mass is also on a drying trend, so this moderating effect won't be as pronounced as normal. Overall the observed temperature is matching the hourly forecast well and the frost/freeze products remain unchanged.
After the sun comes up, the clear skies will allow temperature will begin to climb, but we'll only reach the mid-50s this afternoon for most populated areas. Higher terrain won't get out of the 40s.
LONG TERM
(Sunday through Friday)
Issued at 1207 AM PST Sat Feb 8 2025
Why is it getting so cold? After all the deep air mass isn't that cold. The 850 mb temperature is only in the 10-25th percentile this weekend. This cooling is driven more by dry air supporting enhanced radiational cooling. As the surface dew points drop into the 20s-30s under clear skies, there is nothing to slow down nocturnal cooling. Lower level winds will shift to light offshore Sunday, causing the air mass to dry further. The PWAT looks very likely to drop below 0.2", which is in the bottom 2% for February. This very dry air mass will continue to support clear skies and very cold mornings through early next week. Sunday and Monday look to be the coldest. Our official forecast brings downtown San Francisco to 39 Monday morning. That mark is roughly 10 degrees below normal, and has only been reached 3 times in the last decade (2/23/23, 2/24/23, 3/1/23). Meanwhile San Jose has a 60% chance of dropping below freezing for the first time since 2017.
Everything changes on Wednesday. The winds will shift from northerly to southerly as low pressure system moves over the Pacific Northwest. An associated warm front and cold front will both push through California, bringing a prolonged period of moderate to occasionally heavy rain that will linger into Friday.
The heaviest period currently looks to be from late Wednesday through late Thursday, when 1-3" of rain is expected in the lowlands with more in the coastal mountains. This will likely cause some flooding issues for urban environments and smaller streams. The USGS has also informed us that soil moisture sensors are indicating shallow landslides are likely if the rain rates get high enough. This system will also bring some wind, though with the actual low pressure center much further north than the most recent storm, the pressure gradient and wind potential are somewhat lower. Things currently look to dry out Friday before a dry weekend, but that's not a guarantee as the uncertainty remains high.
AVIATION
(18Z TAFS)
Issued at 917 AM PST Sat Feb 8 2025
High confidence VFR through the TAF period for most terminals except KLVK, where LIFR conditions continue. Fog should clear up shortly after 18Z. Winds will remain relatively light to moderate through the TAF period.
Vicinity of SFO...High confidence VFR with light to moderate winds through the TAF period.
SFO Bridge Approach...Similar to SFO.
Monterey Bay Terminals...VFR through the TAF period. Winds will have southerly direction overnight. but speeds will remain mostly light to moderate through the TAF period.
MARINE
(Today through Thursday)
Issued at 857 AM PST Sat Feb 8 2025
Strong northerly winds will prevail through Tuesday with the bays remaining sheltered from the strongest gusts. Significant wave heights will remain in the moderate to rough realm. An approaching low will bring rain Tuesday night through Friday morning.
MTR WATCHES/WARNINGS/ADVISORIES
CA...Frost Advisory from 1 AM to 9 AM PST Sunday for CAZ502>504-508- 510-512-513-528>530.
Freeze Warning from 1 AM to 9 AM PST Sunday for CAZ506-514>518.
PZ...Small Craft Advisory until 3 AM PST Sunday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Arena to Pt Reyes 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm.
Small Craft Advisory until 9 PM PST Sunday for Pt Pinos to Pt Piedras Blancas 0-10 nm.
Small Craft Advisory until 9 AM PST Monday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM.
Wind History for Redwood City, CA
toggle option: (graph/table)
Airport Reports
Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Air | DewPt | RH | inHg |
KHAF HALF MOON BAY,CA | 3 sm | 30 min | NNW 09 | 6 sm | Clear | Haze | 50°F | 45°F | 82% | 30.38 |
KSFO SAN FRANCISCO INTL,CA | 12 sm | 49 min | N 07 | 10 sm | A Few Clouds | 50°F | 45°F | 82% | 30.38 | |
KSQL SAN CARLOS,CA | 12 sm | 55 min | NNW 07 | 10 sm | Clear | 48°F | 41°F | 76% | 30.39 | |
KPAO PALO ALTO,CA | 19 sm | 58 min | NNW 06 | 10 sm | A Few Clouds | 48°F | 41°F | 76% | 30.39 | |
KOAK METROPOLITAN OAKLAND INTL,CA | 22 sm | 52 min | WNW 07 | 10 sm | A Few Clouds | 48°F | 41°F | 76% | 30.40 | |
KHWD HAYWARD EXECUTIVE,CA | 23 sm | 51 min | calm | 10 sm | Clear | 52°F | 39°F | 62% | 30.37 | |
KNUQ MOFFETT FEDERAL AFLD,CA | 23 sm | 30 min | NW 05 | 10 sm | Clear | 50°F | 39°F | 66% | 30.38 |
Link to 1 hour of 5 minute data for KSFO
Terminal Aerodrome Forecast (TAF) for KSFO
Wind History Graph: SFO
(wind in knots)GEOS Local Image of Central West Coast
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San Francisco Bay Area, CA,

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