Marine Weather and Tide Forecast for Half Moon Bay, CA
December 8, 2023 7:01 AM PST (15:01 UTC)
Sunrise 7:10AM Sunset 4:52PM Moonrise 2:47AM Moonset 2:06PM
PZZ531 San Francisco Bay South Of The Bay Bridge- 135 Am Pst Fri Dec 8 2023
Today..N winds 5 to 10 knots, becoming nw 10 to 15 knots with gusts up to 25 knots this afternoon.
Tonight..NE winds 10 to 15 knots.
Sat..E winds 5 to 10 knots.
Sat night..NE winds 5 to 10 knots.
Sun..NE winds around 5 knots.
Sun night..N winds 5 to 10 knots.
Mon..NW winds 5 to 10 knots.
Tue..N winds around 5 knots.
Today..N winds 5 to 10 knots, becoming nw 10 to 15 knots with gusts up to 25 knots this afternoon.
Tonight..NE winds 10 to 15 knots.
Sat..E winds 5 to 10 knots.
Sat night..NE winds 5 to 10 knots.
Sun..NE winds around 5 knots.
Sun night..N winds 5 to 10 knots.
Mon..NW winds 5 to 10 knots.
Tue..N winds around 5 knots.
PZZ500 135 Am Pst Fri Dec 8 2023
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries...
moderate to fresh northerly breezes will prevail today behind a cold front. Elevated seas will remain in place into tonight as a series of long period northwest swells propagate through the waters. Fresh to strong breezes are expected to return for the offshore waters by early to mid next week.
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries...
moderate to fresh northerly breezes will prevail today behind a cold front. Elevated seas will remain in place into tonight as a series of long period northwest swells propagate through the waters. Fresh to strong breezes are expected to return for the offshore waters by early to mid next week.
Area Discussion for - San Francisco/Monterey Bay Area, CA
(on/off) HelpNOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 081132 AFDMTR
Area Forecast Discussion National Weather Service San Francisco CA 332 AM PST Fri Dec 8 2023
New AVIATION, MARINE
SYNOPSIS
Issued at 1235 AM PST Fri Dec 8 2023
High pressure will bring quiet weather over the next several days.
Cold overnights and interior frost/freezing conditions are expected before a gradual warming trend occurs early next week.
SHORT TERM
(Today and tonight)
Issued at 1235 AM PST Fri Dec 8 2023
A surface cold front was pushing south of the area this morning as an expansive low-level ridge builds into the region from the eastern Pacific. The post-frontal regime brought a colder airmass and drying aloft, albeit with enough residual surface layer moisture remaining for pockets of fog -- some locally dense -- to develop. Outside of monitoring visibility this morning the primary concern is colder temperatures. Readings are already dipping into the 30s within the coldest interior valleys this morning and Freeze Warnings remain in effect for the North Bay and interior Monterey and San Benito Counties. High temperatures this afternoon should rebound into the upper 50s to near 60 before even colder conditions arrive tonight.
Given ideal conditions for radiational cooling the coldest portions of the area should reach into frost/freeze territory once again.
Thus the Freeze Watches for the North Bay Valleys and interior Monterey and San Benito Counties were converted to Freeze Warnings for tonight. Make sure to protect people, pets, plants and pipes from the cold.
LONG TERM
(Saturday through Thursday)
Issued at 1235 AM PST Fri Dec 8 2023
The primary concern through the weekend remains cold overnight temperatures. A Freeze Warning will continue for the North Bay valleys and inland Central Coast Saturday morning. Freeze Watches were also hoisted for these same areas for late Saturday night into Sunday morning.
Relatively quiet weather will prevail for the remainder of the week with gradually warming daytime temperatures. Overnight readings will remain cool however with the coldest interior locations dipping into the upper 30s and 40s. Daytime highs will be mostly in the 60s.
Looking ahead deterministic models and their ensembles suggest a more unsettled pattern may develop around December 16th-18th. But that's pretty far out for the moment so we'll need time for the details to be ironed out. That said, it looks like rain will re- enter the forecast picture around this time.
AVIATION
(12Z TAFS)
Issued at 307 AM PST Fri Dec 8 2023
Patchy MVFR with mist in the North Bay, VFR elsewhere. While the conditions were close, widespread dense fog does not look like it will materialize this morning. Some patches remain, but the overall trend has been improving, despite the temperatures continuing to drop to several degrees below normal. The saving grace was dry air behind the recently passed cold front. There was just enough wind to mix the drier air down to the surface and keep the dew point out of reach of the rapidly falling temperatures overnight. STS will likely improve to VFR within a couple hours, while the timing at APC is a little more uncertain.
Vicinity of SFO...VFR with gentle to moderate NW wind today.
Mostly sunny skies will prevail through the TAF period and beyond.
By tonight, winds will gradually shift from NW to N and possibly NE by Sat morning, although speeds will remain light.
SFO Bridge Approach...Similar to SFO
Monterey Bay Terminals...VFR conditions for both MRY and SNS through the TAF period. There's a small chance SNS will develop MVFR visibility before sunrise, and the TAF hints at this with 6SM BR in the morning. Otherwise it looks like a good day to fly with light winds increasing to a gentle NW breeze in the afternoon.
MARINE
(Today through Wednesday)
Issued at 307 AM PST Fri Dec 8 2023
Moderate to fresh northerly breezes will prevail today behind a cold front. Elevated seas will remain in place into tonight as a series of long period northwest swells propagate through the waters. Fresh to strong breezes are expected to return for the offshore waters by early to mid next week.
MTR WATCHES/WARNINGS/ADVISORIES
CA...Freeze Warning until 9 AM PST this morning for CAZ506-516-518.
Freeze Warning from midnight tonight to 10 AM PST Saturday for CAZ506-516-518.
Freeze Watch from late Saturday night through Sunday morning for CAZ506-516-518.
Dense Fog Advisory until 11 AM PST this morning for CAZ529.
PZ...Small Craft Advisory until 9 AM PST this morning 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 3 AM PST Saturday for Pt Pinos to Pt Piedras Blancas 0-10 nm.
Small Craft Advisory until 9 PM PST this evening 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 332 AM PST Fri Dec 8 2023
New AVIATION, MARINE
SYNOPSIS
Issued at 1235 AM PST Fri Dec 8 2023
High pressure will bring quiet weather over the next several days.
Cold overnights and interior frost/freezing conditions are expected before a gradual warming trend occurs early next week.
SHORT TERM
(Today and tonight)
Issued at 1235 AM PST Fri Dec 8 2023
A surface cold front was pushing south of the area this morning as an expansive low-level ridge builds into the region from the eastern Pacific. The post-frontal regime brought a colder airmass and drying aloft, albeit with enough residual surface layer moisture remaining for pockets of fog -- some locally dense -- to develop. Outside of monitoring visibility this morning the primary concern is colder temperatures. Readings are already dipping into the 30s within the coldest interior valleys this morning and Freeze Warnings remain in effect for the North Bay and interior Monterey and San Benito Counties. High temperatures this afternoon should rebound into the upper 50s to near 60 before even colder conditions arrive tonight.
Given ideal conditions for radiational cooling the coldest portions of the area should reach into frost/freeze territory once again.
Thus the Freeze Watches for the North Bay Valleys and interior Monterey and San Benito Counties were converted to Freeze Warnings for tonight. Make sure to protect people, pets, plants and pipes from the cold.
LONG TERM
(Saturday through Thursday)
Issued at 1235 AM PST Fri Dec 8 2023
The primary concern through the weekend remains cold overnight temperatures. A Freeze Warning will continue for the North Bay valleys and inland Central Coast Saturday morning. Freeze Watches were also hoisted for these same areas for late Saturday night into Sunday morning.
Relatively quiet weather will prevail for the remainder of the week with gradually warming daytime temperatures. Overnight readings will remain cool however with the coldest interior locations dipping into the upper 30s and 40s. Daytime highs will be mostly in the 60s.
Looking ahead deterministic models and their ensembles suggest a more unsettled pattern may develop around December 16th-18th. But that's pretty far out for the moment so we'll need time for the details to be ironed out. That said, it looks like rain will re- enter the forecast picture around this time.
AVIATION
(12Z TAFS)
Issued at 307 AM PST Fri Dec 8 2023
Patchy MVFR with mist in the North Bay, VFR elsewhere. While the conditions were close, widespread dense fog does not look like it will materialize this morning. Some patches remain, but the overall trend has been improving, despite the temperatures continuing to drop to several degrees below normal. The saving grace was dry air behind the recently passed cold front. There was just enough wind to mix the drier air down to the surface and keep the dew point out of reach of the rapidly falling temperatures overnight. STS will likely improve to VFR within a couple hours, while the timing at APC is a little more uncertain.
Vicinity of SFO...VFR with gentle to moderate NW wind today.
Mostly sunny skies will prevail through the TAF period and beyond.
By tonight, winds will gradually shift from NW to N and possibly NE by Sat morning, although speeds will remain light.
SFO Bridge Approach...Similar to SFO
Monterey Bay Terminals...VFR conditions for both MRY and SNS through the TAF period. There's a small chance SNS will develop MVFR visibility before sunrise, and the TAF hints at this with 6SM BR in the morning. Otherwise it looks like a good day to fly with light winds increasing to a gentle NW breeze in the afternoon.
MARINE
(Today through Wednesday)
Issued at 307 AM PST Fri Dec 8 2023
Moderate to fresh northerly breezes will prevail today behind a cold front. Elevated seas will remain in place into tonight as a series of long period northwest swells propagate through the waters. Fresh to strong breezes are expected to return for the offshore waters by early to mid next week.
MTR WATCHES/WARNINGS/ADVISORIES
CA...Freeze Warning until 9 AM PST this morning for CAZ506-516-518.
Freeze Warning from midnight tonight to 10 AM PST Saturday for CAZ506-516-518.
Freeze Watch from late Saturday night through Sunday morning for CAZ506-516-518.
Dense Fog Advisory until 11 AM PST this morning for CAZ529.
PZ...Small Craft Advisory until 9 AM PST this morning 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 3 AM PST Saturday for Pt Pinos to Pt Piedras Blancas 0-10 nm.
Small Craft Advisory until 9 PM PST this evening for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM.
toggle option: (graph/table)
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
| KHAF HALF MOON BAY,CA | 3 sm | 26 min | calm | 10 sm | Clear | 39°F | 39°F | 100% | 30.27 | |
| KSFO SAN FRANCISCO INTL,CA | 12 sm | 65 min | calm | 10 sm | A Few Clouds | 46°F | 39°F | 76% | 30.27 | |
| KSQL SAN CARLOS,CA | 12 sm | 26 min | calm | 10 sm | Clear | 43°F | 43°F | 100% | 30.29 | |
| KOAK METROPOLITAN OAKLAND INTL,CA | 22 sm | 68 min | NNE 03 | 10 sm | A Few Clouds | 39°F | 39°F | 100% | 30.28 | |
| KHWD HAYWARD EXECUTIVE,CA | 23 sm | 67 min | NE 05 | 10 sm | Clear | 41°F | 39°F | 93% | 30.26 | |
| KNUQ MOFFETT FEDERAL AFLD,CA | 23 sm | 26 min | WNW 04 | 10 sm | Clear | 43°F | 41°F | 93% | 30.28 |
Wind History from HAF
(wind in knots)Half Moon Bay
Click for Map
Fri -- 12:20 AM PST 1.91 feet Low Tide
Fri -- 02:46 AM PST Moonrise
Fri -- 06:47 AM PST 5.39 feet High Tide
Fri -- 07:11 AM PST Sunrise
Fri -- 01:46 PM PST 0.77 feet Low Tide
Fri -- 02:06 PM PST Moonset
Fri -- 04:51 PM PST Sunset
Fri -- 07:59 PM PST 3.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 12:20 AM PST 1.91 feet Low Tide
Fri -- 02:46 AM PST Moonrise
Fri -- 06:47 AM PST 5.39 feet High Tide
Fri -- 07:11 AM PST Sunrise
Fri -- 01:46 PM PST 0.77 feet Low Tide
Fri -- 02:06 PM PST Moonset
Fri -- 04:51 PM PST Sunset
Fri -- 07:59 PM PST 3.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Half Moon Bay, California, Tide feet
| 12 am |
| 1.9 |
| 1 am |
| 2 |
| 2 am |
| 2.4 |
| 3 am |
| 3.1 |
| 4 am |
| 3.9 |
| 5 am |
| 4.7 |
| 6 am |
| 5.2 |
| 7 am |
| 5.4 |
| 8 am |
| 5.1 |
| 9 am |
| 4.3 |
| 10 am |
| 3.3 |
| 11 am |
| 2.3 |
| 12 pm |
| 1.4 |
| 1 pm |
| 0.9 |
| 2 pm |
| 0.8 |
| 3 pm |
| 1.1 |
| 4 pm |
| 1.7 |
| 5 pm |
| 2.4 |
| 6 pm |
| 3 |
| 7 pm |
| 3.5 |
| 8 pm |
| 3.7 |
| 9 pm |
| 3.5 |
| 10 pm |
| 3.2 |
| 11 pm |
| 2.8 |
San Mateo Bridge
Click for Map
Fri -- 12:29 AM PST -0.90 knots Max Ebb
Fri -- 02:45 AM PST Moonrise
Fri -- 03:30 AM PST 0.00 knots Slack
Fri -- 06:19 AM PST 1.26 knots Max Flood
Fri -- 07:11 AM PST Sunrise
Fri -- 09:37 AM PST -0.00 knots Slack
Fri -- 01:02 PM PST -1.44 knots Max Ebb
Fri -- 02:05 PM PST Moonset
Fri -- 04:36 PM PST 0.01 knots Slack
Fri -- 04:50 PM PST Sunset
Fri -- 07:19 PM PST 1.29 knots Max Flood
Fri -- 10:41 PM PST -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Fri -- 12:29 AM PST -0.90 knots Max Ebb
Fri -- 02:45 AM PST Moonrise
Fri -- 03:30 AM PST 0.00 knots Slack
Fri -- 06:19 AM PST 1.26 knots Max Flood
Fri -- 07:11 AM PST Sunrise
Fri -- 09:37 AM PST -0.00 knots Slack
Fri -- 01:02 PM PST -1.44 knots Max Ebb
Fri -- 02:05 PM PST Moonset
Fri -- 04:36 PM PST 0.01 knots Slack
Fri -- 04:50 PM PST Sunset
Fri -- 07:19 PM PST 1.29 knots Max Flood
Fri -- 10:41 PM PST -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
San Mateo Bridge, South San Francisco Bay, California Current, knots
| 12 am |
| -0.9 |
| 1 am |
| -0.9 |
| 2 am |
| -0.6 |
| 3 am |
| -0.2 |
| 4 am |
| 0.3 |
| 5 am |
| 0.9 |
| 6 am |
| 1.2 |
| 7 am |
| 1.2 |
| 8 am |
| 0.9 |
| 9 am |
| 0.4 |
| 10 am |
| -0.2 |
| 11 am |
| -0.8 |
| 12 pm |
| -1.3 |
| 1 pm |
| -1.4 |
| 2 pm |
| -1.3 |
| 3 pm |
| -0.9 |
| 4 pm |
| -0.4 |
| 5 pm |
| 0.3 |
| 6 pm |
| 1 |
| 7 pm |
| 1.3 |
| 8 pm |
| 1.2 |
| 9 pm |
| 1 |
| 10 pm |
| 0.5 |
| 11 pm |
| -0.2 |
San Francisco Bay Area, CA,
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