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Marine Weather and Tide Forecast for Alderpoint, CA


May 18, 2026 11:32 AM PDT (18:32 UTC)
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Sunrise 5:55 AM   Sunset 8:29 PM
Moonrise 6:10 AM   Moonset 10:23 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 updated 4/16/2026. Some zones changed. Use Edit if needed.
PZZ455 Coastal Waters From Cape Mendocino To Pt. Arena Ca Out 10 Nm- 935 Am Pdt Mon May 18 2026

.small craft advisory in effect through late Wednesday night - .

Rest of today - NW wind 15 to 20 kt, rising to 20 to 25 kt with gusts up to 35 kt this afternoon. Seas 8 ft. Wave detail: nw 8 ft at 10 seconds and W 3 ft at 19 seconds.

Tonight - N wind 20 to 25 kt. Seas 10 ft. Wave detail: nw 10 ft at 10 seconds and nw 5 ft at 16 seconds.

Tue - NW wind 20 to 25 kt with gusts up to 35 kt. Seas 10 ft. Wave detail: nw 10 ft at 10 seconds and nw 4 ft at 14 seconds.

Tue night - N wind 20 to 25 kt. Seas 9 ft. Wave detail: nw 9 ft at 12 seconds.

Wed - NW wind 20 to 25 kt with gusts up to 40 kt. Seas 8 ft. Wave detail: nw 8 ft at 11 seconds.

Wed night - N wind 20 to 25 kt with gusts up to 35 kt. Seas around 9 ft. Wave detail: nw 9 ft at 10 seconds.

Thu - NW wind 15 to 20 kt. Seas 8 ft. Wave detail: nw 8 ft at 10 seconds.

Thu night - N wind 15 to 20 kt. Seas 8 ft. Wave detail: nw 8 ft at 10 seconds and S 2 ft at 14 seconds.

Fri - NW wind 15 to 20 kt. Seas 9 ft. Wave detail: nw 9 ft at 10 seconds and sw 2 ft at 16 seconds.

Fri night - N wind 10 to 15 kt. Seas 9 ft. Wave detail: nw 9 ft at 10 seconds and S 2 ft at 15 seconds.
PZZ400 935 Am Pdt Mon May 18 2026

Synopsis for northern california waters - NEar gale to gale force northerly winds continue early this week. The stronger winds have pushed slightly farther off the coast, although there may be brief threat for gales in afternoon and evening. These winds are expected to continue through much of the workweek. A longer period swell is expected to build to 6 feet at 17 seconds this afternoon and then diminish.

7 Day Forecast for Marine Location Near Alderpoint, CA
   
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Tide / Current for Shelter Cove, California
  
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Shelter Cove
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Mon -- 05:58 AM PDT     Sunrise
Mon -- 07:05 AM PDT     -1.90 feet Low Tide
Mon -- 07:13 AM PDT     Moonrise
Mon -- 02:12 PM PDT     4.86 feet High Tide
Mon -- 06:47 PM PDT     2.90 feet Low Tide
Mon -- 08:27 PM PDT     Sunset
Mon -- 11:25 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Shelter Cove, California does not exist in database. Press Edit above and select a valid nearby location.

Shelter Cove, California, Tide feet
12
am
6.9
1
am
6.4
2
am
5.2
3
am
3.4
4
am
1.5
5
am
-0.3
6
am
-1.5
7
am
-1.9
8
am
-1.6
9
am
-0.6
10
am
0.6
11
am
2
12
pm
3.4
1
pm
4.4
2
pm
4.8
3
pm
4.7
4
pm
4.2
5
pm
3.5
6
pm
3
7
pm
2.9
8
pm
3.3
9
pm
4.1
10
pm
5.1
11
pm
6.1

Tide / Current for Westport, California
  
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Westport
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Mon -- 05:58 AM PDT     Sunrise
Mon -- 07:09 AM PDT     -2.01 feet Low Tide
Mon -- 07:13 AM PDT     Moonrise
Mon -- 02:18 PM PDT     4.24 feet High Tide
Mon -- 06:28 PM PDT     2.48 feet Low Tide
Mon -- 08:25 PM PDT     Sunset
Mon -- 11:22 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
        
  Sorry, Westport, California does not exist in database. Press Edit above and select a valid nearby location.

Westport, California, Tide feet
12
am
6.8
1
am
6.4
2
am
5.2
3
am
3.5
4
am
1.6
5
am
-0.2
6
am
-1.5
7
am
-2
8
am
-1.8
9
am
-0.9
10
am
0.3
11
am
1.7
12
pm
3
1
pm
3.8
2
pm
4.2
3
pm
4.1
4
pm
3.6
5
pm
3
6
pm
2.5
7
pm
2.5
8
pm
3
9
pm
3.8
10
pm
4.9
11
pm
5.8

Area Discussion for Eureka, CA
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FXUS66 KEKA 180741 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 1241 AM PDT Mon May 18 2026

SYNOPSIS
Gusty north winds continue to ease today. Clear and dry conditions will remain through the week with a warming trend through Thursday.

KEY MESSAGES

-Strong north winds will weaken today and through the week with only moderate north winds close to shore.

-Generally clear skies and dry conditions, even along shore, through the week.

-Conditions will warm through Thursday with highs in the interior peaking near 90.


DISCUSSION
Strong north winds continue to subside for Northwest California, especially near shore when compared to yesterday, but will persist through early today around the rim of the Sacramento Valley, especially Lake County. Strong mixing will continue to keep skies clear as temperatures begin to warm, especially across the interior. Wind overnight will continue to preclude any frost formation.

High pressure will already begin to weaken but move more onshore today and through the week. This will lead to much weaker north winds with some moderate gusts to 20 mph still pushing in right along shore in the afternoon. Interior winds will transition to a more terrain controlled regime. Conditions will remain very dry with warming temperatures through the week. Highs will most likely top out around 90 for the interior on Thursday. This will constitute only a minor HeatRisk for this time of year. Hotter temperatures will help reform a marine inversion. Any stratus and fog; however, will most likely be very shallow and mix out quickly during the day.

Compared to previous runs, most ensemble members continue to show a weak trough in the far extended forecast, but have it delayed until after next week. Rather most models show high pressure slowly weakening, allow temperature to drop, through next weekend. A trough early next week could bring some light showers or thunderstorms, but the vast majority of models currently remain dry. /JHW



AVIATION
VFR conditions are expected for terminals in Northwest California as gusty north winds remain elevated, but quickly diminish early this morning. Winds will remain elevated for higher elevation areas of the Yolla Bollys and Lake County.
Winds have diminished for more protected areas; however, winds remain elevated aloft, bringing LLWS concerns mostly for Mendocino County.



MARINE
The pressure gradient relaxes slightly and the strongest winds move farther off the coast as the high pressure builds in. However, a large area of gale force gusts around 34-45 kts expected across all zones, with the strongest winds downwind of Cape Mendocino. Steep to very steep, hazardous seas will continue with the elevated winds. Conditions will remain hazardous across the waters for much of the workweek with strong to gale force gusts north winds and steep to very steep seas. Gale force winds and very steep seas are forecast to persists across the outer waters through Friday. /ZVS

FIRE WEATHER
Strong north winds will continue, but diminish into the early morning. Winds will especially remain elevated around the rim of the Sacramento Valley and in Lake County today. Winds will weaken by this evening and transition to more gentle terrain wind through the week. Conditions will remain very dry with high temperatures increasing to near 90 for the interior by Thursday.



EKA WATCHES/WARNINGS/ADVISORIES
CA...
None.
NORTHWEST CALIFORNIA COASTAL WATERS...
Gale Warning until 3 AM PDT early this morning for PZZ450- 455.

Gale Warning until 3 AM PDT Wednesday for PZZ470-475.


Weather Reporting Stations
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Wind History for Arena Cove, CA
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Airport Reports
   
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KFOT47 sm17 minWNW 0910 smClear61°F52°F72%30.14

Weather Map
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GEOS Local Image of Central West Coast  
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Eureka, CA,





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