Half Moon Bay, California

Coastal conditions for trip planning. Informational only.

Low-tide calendar

Low-tide thresholdShaded = approximately below threshold

Today's weather, wind, waves and warnings

Marine & weather warnings

Official NWS alerts - these are warnings, not forecasts.

No active NWS watches, warnings or advisories for Half Moon Bay land zone or coastal waters at fetch time.

Current · Current official information · Source: National Weather Service active alerts · Last updated: Oct 20, 8:36 AM PDT

Tide

Next High: 6:51 PM · 4.4 ft
Next Low: 1:30 PM · 2.7 ft

Today's tides (ft above MLLW)
Low ▼	1:01 AM	0.7 ft
High ▲	8:06 AM	4.4 ft
Low ▼	1:30 PM	2.7 ft
High ▲	6:51 PM	4.4 ft

Long range · Predictable months ahead · Source: NOAA CO-OPS tide predictions, station 9414131 (Pillar Point Harbor), MLLW datum

Sun & Moon

Sunrise: 7:23 AM
Sunset: 6:26 PM
Moonrise: 3:39 PM
Moonset: 1:32 AM

Moon phase: Waxing Gibbous

Long range · Predictable months ahead · Source: U.S. Naval Observatory (Pacific local time)

Weather & Wind

Temperature: 52°F
Feels like: 52°F
Precipitation chance: 2%
Cloud cover: 60%
Fog: None forecast
Visibility: 10.0 mi
Wind: 2 mph E
Gusts: 6 mph

Short range · ~7 days · Source: National Weather Service gridpoint MTR/82,92 · Period: hour of Oct 20, 9:00 AM PDT · Last updated: Oct 20, 7:21 AM PDT

Ocean

Wave height: 5.3 ft
Wave period: 13 s
Wave direction: W
Swell height: 4.6 ft
Swell period: 10 s
Swell direction: WNW

Short range · ~7 days · Source: Open-Meteo Marine API (model data, not an official forecast) · Period: hour of Oct 20, 9:00 AM PDT · Last updated: Oct 20, 8:36 AM PDT

Official NWS marine forecast - Today

SE wind around 5 kt, veering to W late. Seas 4 to 6 ft. Wave Detail: NW 5 ft at 13 seconds and S 3 ft at 15 seconds.

Short range · Official forecast text · Source: National Weather Service coastal waters forecast PZZ545 (Coastal Waters from Point Reyes to Pigeon Point out to 10 nm) · Last updated: Oct 20, 2:42 AM PDT

Forecasts are not guarantees and are not a substitute for official warnings or emergency instructions. In an emergency call 911.

7-day forecast

7-Day Forecast

Short-range forecast only (about 7 days). Conditions cannot be predicted months ahead. All times Pacific.

Date	Temp °F (hi / lo)	Wind (mph, peak)	Gust (mph)	Visibility (mi, min)	Fog	Precip (in / chance)	Wave (ft @ s)	Swell (ft @ s)
Tue, Oct 20	62 / 47	6 WNW	7	10.0	None	0.00 / 23%	6.6 @ 12	6.0 @ 10 WNW
Tides: Low 1:01 AM 0.7 ft · High 8:06 AM 4.4 ft · Low 1:30 PM 2.7 ft · High 6:51 PM 4.4 ft
Wed, Oct 21	62 / 50	5 W	7	10.0	3 h forecast	0.24 / 55%	6.3 @ 12	5.6 @ 10 WNW
Tides: Low 1:43 AM 0.7 ft · High 8:29 AM 4.7 ft · Low 2:19 PM 2.1 ft · High 7:54 PM 4.5 ft
Thu, Oct 22	60 / 52	12 WNW	20	—	11 h forecast	0.00 / 38%	5.1 @ 8	4.3 @ 5 WNW
Tides: Low 2:22 AM 0.8 ft · High 8:51 AM 5.0 ft · Low 3:01 PM 1.4 ft · High 8:51 PM 4.7 ft
Fri, Oct 23	63 / 49	12 WNW	20	—	None	0.00 / 0%	6.2 @ 8	5.8 @ 6 WNW
Tides: Low 2:57 AM 1.0 ft · High 9:15 AM 5.4 ft · Low 3:40 PM 0.7 ft · High 9:42 PM 4.7 ft
Sat, Oct 24	65 / 47	5 NW	7	—	None	0.00 / 3%	6.0 @ 9	5.6 @ 7 WNW
Tides: Low 3:30 AM 1.2 ft · High 9:40 AM 5.8 ft · Low 4:19 PM 0.1 ft · High 10:31 PM 4.8 ft
Sun, Oct 25	66 / 50	6 NW	9	—	None	0.00 / 7%	3.9 @ 10	3.3 @ 6 WNW
Tides: Low 4:02 AM 1.5 ft · High 10:08 AM 6.1 ft · Low 4:59 PM -0.5 ft · High 11:21 PM 4.7 ft
Mon, Oct 26	64 / 50	7 NW	10	—	None	0.00 / 6%	3.2 @ 12	1.9 @ 8 NW
Tides: Low 4:35 AM 1.9 ft · High 10:39 AM 6.4 ft · Low 5:42 PM -0.9 ft

Short range · ~7 days · Source: National Weather Service gridpoint MTR/82,92 · Period: Oct 20, 8:00 AM PDT to Oct 27, 7:00 AM PDT · Last updated: Oct 20, 7:21 AM PDT

Short range · ~7 days (peak wave and swell of each day) · Source: Open-Meteo Marine API (model data, not an official forecast) · Last updated: Oct 20, 8:36 AM PDT

Long range · Tide times shown for reference · Source: NOAA CO-OPS tide predictions, station 9414131 (Pillar Point Harbor), MLLW datum

Official NWS Marine Forecast

Coastal Waters from Point Reyes to Pigeon Point out to 10 nm (PZZ545)

Today. SE wind around 5 kt, veering to W late. Seas 4 to 6 ft. Wave Detail: NW 5 ft at 13 seconds and S 3 ft at 15 seconds.
Tonight. NW wind around 5 kt, veering to NE around 5 kt after midnight. Seas 5 to 7 ft. Wave Detail: NW 6 ft at 12 seconds and S 2 ft at 15 seconds. A chance of showers.
Wed. SE wind around 5 kt, veering to W in the afternoon. Seas 3 to 5 ft. Wave Detail: NW 5 ft at 11 seconds and S 2 ft at 14 seconds. A chance of showers.
Wed Night. NW wind around 5 kt. Seas 3 to 4 ft. Wave Detail: NW 4 ft at 10 seconds and S 2 ft at 14 seconds. A slight chance of showers in the evening, then a chance of showers after midnight.
Thu. NW wind 5 to 10 kt, becoming W 10 to 15 kt in the afternoon. Seas 3 to 4 ft. Wave Detail: NW 3 ft at 11 seconds and S 2 ft at 15 seconds. A chance of showers, mainly in the morning.
Thu Night. NW wind 15 to 20 kt. Seas 3 to 4 ft, building to 5 to 7 ft after midnight. Wave Detail: NW 6 ft at 8 seconds and SW 2 ft at 16 seconds.
Fri. NW wind 10 to 15 kt, easing to 5 to 10 kt in the afternoon. Seas 4 to 6 ft. Wave Detail: NW 4 ft at 9 seconds and SW 4 ft at 13 seconds.
Fri 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 10 seconds and SW 3 ft at 14 seconds.
Sat. N wind around 5 kt. Seas 4 to 6 ft. Wave Detail: NW 4 ft at 10 seconds and SW 3 ft at 15 seconds.
Sat Night. NW wind 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: NW 3 ft at 10 seconds and SW 2 ft at 13 seconds. IN THE DEEP WATER CHANNEL...Mixed seas of 3 to 5 ft at 15 seconds. ACROSS THE BAR...Swell can be more than twice as high across the bar than surrounding waters. Waves are also more prone to break, particularly during strong ebb currents. Maximum ebb current of 1.3 kt at 01:24 PM Tuesday and 1.5 kt at 01:18 AM Wednesday.

Short range · Official forecast · Source: National Weather Service coastal waters forecast PZZ545 · Last updated: Oct 20, 2:42 AM PDT

Hourly detail

Next 24 hours.

Time	Temp °F	Wind mph	Gust mph	Vis mi	Fog	Wave ft
Tue, Oct 20 8 AM	47	2 E	6	10.0	—	5.2
Tue, Oct 20 9 AM	52	2 E	6	10.0	—	5.3
Tue, Oct 20 10 AM	56	2 E	6	10.0	—	5.5
Tue, Oct 20 11 AM	58	3 ESE	6	10.0	—	5.6
Tue, Oct 20 12 PM	58	5 SSW	7	10.0	—	5.8
Tue, Oct 20 1 PM	60	5 W	7	10.0	—	5.9
Tue, Oct 20 2 PM	60	5 W	7	10.0	—	6.0
Tue, Oct 20 3 PM	61	5 WNW	7	10.0	—	6.2
Tue, Oct 20 4 PM	62	6 WNW	7	10.0	—	6.3
Tue, Oct 20 5 PM	60	5 W	7	10.0	—	6.4
Tue, Oct 20 6 PM	59	3 WNW	5	10.0	—	6.5
Tue, Oct 20 7 PM	58	2 NNW	5	10.0	—	6.6
Tue, Oct 20 8 PM	56	2 N	5	10.0	—	6.6
Tue, Oct 20 9 PM	55	2 N	3	10.0	—	6.6
Tue, Oct 20 10 PM	54	2 NNE	3	10.0	—	6.5
Tue, Oct 20 11 PM	54	1 NNE	2	10.0	—	6.4
Wed, Oct 21 12 AM	54	1 NNE	2	10.0	—	6.3
Wed, Oct 21 1 AM	53	1 ENE	2	10.0	—	6.1
Wed, Oct 21 2 AM	53	1 E	2	10.0	—	6.0
Wed, Oct 21 3 AM	52	1 E	2	10.0	—	5.8
Wed, Oct 21 4 AM	52	1 E	2	10.0	—	5.7
Wed, Oct 21 5 AM	52	2 SE	5	10.0	—	5.6
Wed, Oct 21 6 AM	50	2 SE	5	—	—	5.4
Wed, Oct 21 7 AM	51	2 SE	5	—	—	5.3

Long range · ~6 months · Source: NOAA CO-OPS tide predictions, station 9414131 (Pillar Point Harbor), MLLW datum. Shading and sun markers are astronomical calculations (NOAA solar algorithm) and say nothing about clouds, fog or visibility. Hourly predictions drawn as straight segments between real NOAA values; one-day view uses 6-minute predictions. Times Pacific.