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Surf Forecasts:

Third Reef surfForecast / CAL – Humboldt / USA

information circle12 Day Weather and Surf, issued 10 am Wednesday 17 Sep 2025 PDT
Forecast update in hr  min  s Forecast update imminent
Third Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Third Reef sea temperature is
14.7° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for Third Reef this week:

The surf forecast for Third Reef over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 18) at 5AM. The primary swell is predicted to be 3.0m and 10s period with a secondary swell of 2.4m and 10s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Third Reef in the next 12 days are 3.0m 10s and forecast to arrive on Thursday (Sep 18) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 16s period and expected on Wednesday (Sep 17) at 5PM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Thu 18th Sep)10ft (3.0m) 10s
Best Surf 5AM (Thu 18th Sep)10ft (3.0m) 10s
Most Powerful 5AM (Thu 18th Sep)10ft (3.0m) 10s

Table - best surf conditions forecast for Third Reef over the next 12 days.

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

Short Range Forecast Some drizzle, heaviest during Thu night. Warm (max 24°C on Wed afternoon, min 14°C on Wed night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 25°C on Sun afternoon, min 14°C on Mon night). Wind will be generally light.

Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
1
2
2
4
4
2
1
2
1
2
3
1
0
2
2
3
3
2
3
3
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.8
WNW
1.6
NW
3
NW
2.3
NW
2.3
NW
2.1
NW
1.7
NW
1.4
NW
1.1
NW
1
NW
1.1
NW
1.3
WNW
1.3
WNW
1.3
WNW
1.3
WNW
1.5
WNW
1.6
NW
1.4
NW
1.3
WNW
1.3
WNW
1.3
WNW
Period(s) (?)10108101010109109912121111111111111111
Wave
Graph
(?)Metric surfscale
Energy kJ (?)107499105810981112918542347231162194436449379359543582467375396389
Wind
(km/h)
15
NW
20
NNW
15
N
15
WNW
0
NNE
5
SSW
5
SW
10
WNW
5
N
10
W
0
WNW
10
NNE
15
NW
25
NNW
15
NNE
10
WNW
5
WNW
5
NW
5
S
15
SE
10
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		crosscrosscross-
on		glassglasscross-
on		onglassonglasscross-
off		cross-
on		cross-
on		cross-
off		cross-
on		glassglasscrosscross-
off		off
High Tide
/ height (m)
9:50AM
1.45
8:35PM
1.84
10:27AM
1.54
9:35PM
1.85
10:59AM
1.62
10:28PM
1.84
11:28AM
1.69
11:16PM
1.80
11:56AM
1.74
12:01AM
1.74
12:22PM
1.77
12:45AM
1.66
12:47PM
1.78
1:28AM
1.57
Low Tide
/ height (m)
2:41PM
0.93
3:45AM
-0.05
3:43PM
0.77
4:29AM
-0.02
4:35PM
0.61
5:07AM
0.05
5:19PM
0.47
5:40AM
0.15
5:59PM
0.34
6:11AM
0.27
6:36PM
0.25
6:40AM
0.41
7:12PM
0.19
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Sunrise6:58--6:58--7:00--7:01--7:01--7:03--7:03--
Sunset-7:22--7:20--7:17--7:16--7:15--7:13--7:12-
clear
clear
clear
part cloud
cloud
light rain
cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
clear
cloud
rain showers
part cloud
Rain (mm)
-----1-------------1-
Temp. °C202418191717151616171716212519191615151515
Feels °C (?)182015171617151616161616182118181515141314
  • 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 Third Reef (calm at Benbow wx 25 km from Third Reef). 1.9m 6s windswell from the NW with a 0.7m 13s groundswell from the SW. 2 swells combining to make bigger set waves.

    1 hour 5 minutes ago Third Reef
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25 km away, 1 h 5 min ago

0 km/h
N
0.0
14.7
Air / Water (°C)
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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 Third Reef 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 Third Reef at:
surf-forecast.com

Information about the Third Reef Surf forecast

The above surf forecast table for Third Reef provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Third Reef can be found by selecting the local surf guide option on the grey menu. Our Third Reef 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 (Third Reef) 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 Third Reef 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.

Third Reef is 85 km (53 miles) from Eureka. If you plan a vacation in Humboldt County, look for hotels and other accommodation in Eureka. Eureka has rooms for a wide range of budgets as well as car hire and transport links.

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