Moonstone Beach surfForecast / CAL – Humboldt / USA

information circle12 Day Weather and Surf, issued 10 am Wednesday 09 Jul 2025 PDT
Forecast update in 4hr 23 min 13 s Forecast update imminent
Moonstone Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Moonstone Beach sea temperature is
55.0°F
(Which is normal for this time of year)


Best Forecast Surf Conditions for Moonstone Beach this week:

The surf forecast for Moonstone Beach over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jul 09) at 11PM. The primary swell is predicted to be 3ft and 8s period with a secondary swell of 1ft and 4s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Moonstone Beach in the next 12 days are 11ft 9s and forecast to arrive on Friday (Jul 11) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1ft 13s period and expected on Wednesday (Jul 09) at 2PM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+)11PM (Wed 9th Jul)2.5ft (0.8m) 8s
Best Surf 5PM (Fri 11th Jul)11ft (3.5m) 9s
Most Powerful 8PM (Fri 11th Jul)11ft (3.5m) 9s

Table - best surf conditions forecast for Moonstone Beach over the next 12 days.

Updates in 4 hr 23 min 13 s Forecast update imminent
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (ft) & direction (?)
2.5
NW
2.5
WNW
3.5
NW
5
NW
7.5
NW
8
NW
8
NW
11
NW
10
NW
8
NW
10
NW
10
NW
8
NW
10
NW
10
NW
10
NW
10
NW
8
NW
7
NW
6
NW
6
NW
5
NW
4.5
NW
3.5
NW
3.5
NW
4.5
NW
5
NW
6
NW
6
NW
7
NW
6.5
NW
6.5
NW
6
NW
6
NW
5
NW
5
NW
Period(s) (?)8887888999910999999889989899999998889
Wave
Graph
(?)Metric surfscale
Energy (?)8113920632066981895518441681117013601682116414391622124213511093635545519423350354407321562603635718622608515413360446
Wind
(mph)
10
NW
10
NNW
5
NE
10
NNW
10
NNW
5
N
10
NNW
10
NNW
5
NNE
10
NNW
5
W
0
SSE
5
SW
5
WSW
5
N
10
NW
10
NW
5
S
5
WSW
5
SW
5
S
5
WSW
5
WSW
5
N
10
NNW
5
NW
5
ESE
5
NW
10
NNW
5
ESE
5
NW
10
NNW
5
ESE
5
NW
10
NW
5
SSE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
crossglasscross-
on
cross-
on
crosscross-
on
crosscross-
off
cross-
on
onglasscross-
on
oncrosscross-
on
cross-
on
cross-
off
cross-
on
cross-
on
crosscross-
on
cross-
on
crosscross-
on
cross-
on
glasscross-
on
cross-
on
glasscross-
on
cross-
on
glasscross-
on
cross-
on
cross-
off
High Tide
/ height (ft)
12:45PM
4.99
11:05PM
6.89
1:19PM
5.15
11:46PM
6.99
1:52PM
5.28
12:27AM
6.99
2:26PM
5.45
1:09AM
6.82
2:59PM
5.64
1:54AM
6.53
3:33PM
5.91
2:44AM
6.04
4:09PM
6.17
3:42AM
5.48
4:46PM
6.46
4:51AM
4.86
5:28PM
6.73
6:15AM
4.43
6:15PM
6.96
7:50AM
4.3
7:08PM
7.15
9:19AM
4.49
8:06PM
7.35
Low Tide
/ height (ft)
5:12PM
3.45
6:26AM
-0.95
5:55PM
3.31
7:02AM
-1.12
6:37PM
3.12
7:38AM
-1.18
7:22PM
2.92
8:13AM
-1.08
8:10PM
2.69
8:48AM
-0.79
9:04PM
2.4
9:25AM
-0.26
10:03PM
2.03
10:03AM
0.43
11:08PM
1.57
10:45AM
1.21
12:18AM
1.02
11:33AM
2
1:29AM
0.43
12:31PM
2.69
2:36AM
-0.2
1:40PM
3.15
3:38AM
-0.75
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Sunrise5:52--5:52--5:52--5:54--5:54--5:56--5:56--5:56--5:58--5:58--6:00--6:01--
Sunset-8:50--8:50--8:49--8:49--8:47--8:47--8:46--8:45--8:45--8:45--8:44--8:44-
clearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclear
Rain (in)
------------------------------------
Temp. °F596359646457646459686861646663666457636459596157616355616355636355636357
Feels °F (?)555955616155615955646661636664646157616359555957575954595954615954616155

Short Range Forecast: Mostly dry. Very mild (max 64°F on Thu morning, min 54°F on Wed night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 68°F on Sat morning, min 54°F on Mon night). Wind will be generally light.

Days 6-9 Weather Summary Mostly dry. Very mild (max 64°F on Tue afternoon, min 52°F on Tue night). Wind will be generally light.

Long Range Forecast: Mostly dry. Very mild (max 63°F on Fri afternoon, min 52°F on Fri night). Wind will be generally light.

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Information about the Moonstone Beach Surf forecast

The above surf forecast table for Moonstone Beach provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Moonstone Beach can be found by selecting the local surf guide option on the grey menu. Our Moonstone Beach surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Moonstone Beach) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Moonstone Beach may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Moonstone Beach is 10 km (6 miles) from McKinleyville. If you plan a vacation in Humboldt County, look for hotels and other accommodation in McKinleyville. McKinleyville has rooms for a wide range of budgets as well as car hire and transport links.

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