Third Reef surfForecast / CAL – Humboldt / USA

information circle12 Day Weather and Surf, issued 3 pm Saturday 13 Dec 2025 PST
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
13.1° C
(Which is 1.1°C warmer than normal for this time of year)


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 Saturday (Dec 13) at 7PM. The primary swell is predicted to be 1.1m and 12s period with a secondary swell of 0.3m and 16s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Third Reef in the next 12 days are 3.0m 11s and forecast to arrive on Friday (Dec 19) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Thursday (Dec 18) at 4PM.

Wave TypeTime (PST) & Date Wave Height & Period
Next good surf (1 star+) 7PM (Sat 13th Dec)3.5ft (1.1m) 12s
Best Surf10PM (Mon 15th Dec)7ft (2.2m) 12s
Most Powerful10AM (Fri 19th Dec)10ft (3.0m) 11s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Light rain (total 3mm), mostly falling on Mon afternoon. Very mild (max 16°C on Mon morning, min 10°C on Sat night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 54mm), heaviest during Thu night. Very mild (max 15°C on Tue afternoon, min 8°C on Wed night). Winds increasing (calm on Wed night, strong winds from the SSE by Thu night).

Sat
13
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
2
2
2
2
2
2
3
4
4
4
1
3
1
4
3
2
2
1
3
4
3
Swell
Height Map
Wave Height (m) & direction (?)
0.8
WNW
1
W
0.9
W
1
W
0.9
W
0.8
WSW
1.4
W
2.4
W
2.2
W
2
W
2.5
WSW
2.4
W
2
W
2.5
WNW
1.9
W
1.8
WSW
2.5
W
3
W
2.1
W
1.6
NW
1.4
NW
Period(s) (?)11121110109111211111212121111111111101212
Wave
Graph
(?)Metric surfscale
Energy kJ (?)15326819120614810343415571193934173516521194172083570517362157918712561
Wind
(km/h)
5
W
5
E
10
SE
10
E
10
ESE
5
SSE
5
ENE
0
E
5
NE
5
SSE
20
WSW
10
N
15
NW
5
ENE
20
SE
20
SE
35
SSE
15
SW
10
WNW
10
NNE
10
NNE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glassglasscross-
off
offcross-
off
cross-
off
cross-
off
glassglasscross-
off
cross-
on
crosscross-
on
offcross-
off
cross-
off
cross-
off
cross-
on
cross-
on
cross-
off
cross-
off
High Tide
/ height (m)
7:00PM
1.25
7:01AM
1.85
8:15PM
1.26
7:35AM
1.90
9:17PM
1.31
8:08AM
1.95
10:09PM
1.36
8:41AM
1.99
10:55PM
1.41
9:15AM
2.02
11:37PM
1.44
9:50AM
2.03
12:17AM
1.47
10:25AM
2.03
Low Tide
/ height (m)
12:18AM
0.67
2:04PM
0.36
1:04AM
0.81
2:50PM
0.20
1:50AM
0.91
3:30PM
0.06
2:34AM
0.98
4:07PM
-0.04
3:16AM
1.03
4:43PM
-0.12
3:56AM
1.06
5:18PM
-0.16
4:34AM
1.09
Sat
13
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Sunrise--7:30--7:30--7:31--7:31--7:31--7:33--7:33
Sunset4:51--4:51--4:51--4:52--4:52--4:52--4:52--
clear
clear
part cloud
part cloud
part cloud
cloud
light rain
part cloud
cloud
mod rain
rain showers
clear
clear
part cloud
cloud
light rain
rain showers
heavy rain
part cloud
part cloud
part cloud
Rain (mm)
------3--610----22016---
Temp. °C11101312131614151515141212911121313121110
Feels °C (?)10911109131315161510887778111098
  • 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

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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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