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Surf Forecasts:

Moonstone Beach surfForecast / CAL – Humboldt / USA

information circle12 Day Weather and Surf, issued 10 pm Sunday 12 Oct 2025 PDT
Forecast update in hr  min  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
13.3° C
 (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 Monday (Oct 13) at 2AM. The primary swell is predicted to be 1.8m and 10s period with a secondary swell of 0.4m and 14s. 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 3.5m 15s and forecast to arrive on Sunday (Oct 19) at 8PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 15s period and expected on Sunday (Oct 19) at 5PM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Mon 13th Oct)6ft (1.8m) 10s
Best Surf 8PM (Sun 19th Oct)11ft (3.5m) 15s
Most Powerful 8PM (Sun 19th Oct)11ft (3.5m) 15s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Moderate rain (total 14mm), heaviest on Mon morning. Very mild (max 15°C on Tue afternoon, min 9°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Very mild (max 18°C on Sat afternoon, min 9°C on Thu morning). Wind will be generally light.

Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
Sun
19
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
2
3
3
4
4
2
3
1
1
2
2
0
3
2
2
4
4
4
4
3
4
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.8
NW
1.7
NW
2.3
NW
2.5
NW
2.3
NW
1.9
NW
0.9
WNW
0.9
WNW
0.9
WNW
0.9
WNW
0.6
WNW
0.7
WNW
1.8
NW
0.9
WNW
0.7
WNW
2
WNW
2.3
WNW
2.5
WNW
2
WNW
1.6
WNW
3
WNW
Period(s) (?)109101010915151414151581420161515141316
Wave
Graph
(?)Metric surfscale
Energy kJ (?)6024881103140692559335830529726118622835026134220212419252914918244700
Wind
(km/h)
10
SSE
5
ESE
15
N
15
E
5
NW
10
NNW
10
SE
10
SSW
10
SSW
5
NNE
5
NW
15
NNW
5
ENE
5
NW
10
NNW
10
SE
5
W
5
W
10
SE
5
NE
10
NW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		glasscrossoffglasscrosscross-
off		crosscross-
on		cross-
off		glasscrossglassglasscrosscross-
off		glassglasscross-
off		glasscross-
on
High Tide
/ height (m)
6:22AM
1.57
4:55PM
1.93
7:37AM
1.60
6:19PM
1.81
8:37AM
1.68
7:42PM
1.75
9:23AM
1.77
8:54PM
1.74
10:00AM
1.86
9:54PM
1.74
10:31AM
1.94
10:45PM
1.74
10:59AM
2.01
Low Tide
/ height (m)
11:12PM
-0.12
11:04AM
1.11
12:25AM
-0.02
12:38PM
1.07
1:35AM
0.04
2:03PM
0.92
2:35AM
0.09
3:09PM
0.73
3:25AM
0.15
4:01PM
0.52
4:06AM
0.23
4:45PM
0.34
4:42AM
0.34
5:23PM
0.18
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
Sun
19
Sunrise-7:24--7:26--7:26--7:28--7:28--7:30--7:31-
Sunset--6:38--6:37--6:36--6:34--6:32--6:30--6:30
rain showers
heavy rain
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
mod rain
clear
Rain (mm)
113-----------------10-
Temp. °C121113111415111415121314111516131718141213
Feels °C (?)1110108121310121312121191314111517121111
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for CAL - Humboldt

  1. weather stationWind Update Continuing clean conditions at Moonstone Beach (light winds from the ESE at Arcata/Eureka Airport 6 km from Moonstone Beach). 2.0m 10s swell from the NW which is too big for here.

    1 hour 16 minutes ago Moonstone Beach
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1 h 16 min ago

6 km/h
ESE
Clean
Please reload the page to see if there are any updates.

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Moonstone Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Moonstone Beach at:
surf-forecast.com

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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