Third Reef surfForecast / CAL – Humboldt / USA

information circle16 Day Weather and Surf, issued 10 am Monday 20 Apr 2026 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
11.1° C
(Which is slightly cooler than normal)

Best Forecast Surf Conditions for Third Reef this week:

The surf forecast for Third Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Apr 20) at 5PM. The primary swell is predicted to be 2.1m and 12s period with a secondary swell of 0.7m and 13s. Another secondary swell of 0.7m and 6s is also forecast. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Third Reef in the next 16 days are 2.1m 12s and forecast to arrive on Monday (Apr 20) at 5PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 6s period and expected on Tuesday (Apr 21) at 8AM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Mon 20th Apr)7ft (2.1m) 12s
Best Surf 5PM (Mon 20th Apr)7ft (2.1m) 12s
Most Powerful 5PM (Mon 20th Apr)7ft (2.1m) 12s

Table - best surf conditions forecast for Third Reef over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast Heavy rain (total 46mm), heaviest during Mon morning. Very mild (max 12°C on Mon night, min 8°C on Wed night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Very mild (max 13°C on Thu afternoon, min 7°C on Thu night). Wind will be generally light.

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
4
4
3
2
1
2
2
2
3
1
0
3
1
1
2
1
1
2
1
2
2
Swell
Height Map
Wave Height (m) & direction (?)
1.7
WNW
2.1
WNW
1.7
WNW
1.4
WNW
1.3
WNW
1.1
WNW
0.9
WNW
1
WNW
1
WNW
1.4
WNW
1.4
NW
1
NW
0.8
WNW
0.9
NW
1
NW
1
NW
0.6
WNW
0.9
WNW
1
WNW
1.1
WNW
1
WNW
Period(s) (?)1312111110101514141311111210991516141413
Wave
Graph
(?)Metric surfscale
Energy kJ (?)10261252704452333245334357413663441233180160159153174362394494357
Wind
(km/h)
15
E
5
ESE
15
SE
15
S
10
W
0
SW
15
SSW
10
WSW
10
NE
15
WNW
20
NW
15
NNE
10
W
5
W
5
SE
10
S
10
SSW
10
ENE
5
WSW
10
WSW
10
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
offoffcross-
off
cross-
off
onglasscrossoncross-
off
cross-
on
cross-
on
cross-
off
ononglasscrosscrossoffoncross-
on
off
High Tide
/ height (m)
3:13PM
1.40
1:52AM
2.01
4:19PM
1.33
2:44AM
1.91
5:32PM
1.30
3:47AM
1.76
6:45PM
1.33
5:04AM
1.61
7:45PM
1.41
6:33AM
1.49
8:31PM
1.51
7:57AM
1.44
9:09PM
1.61
Low Tide
/ height (m)
8:21AM
-0.48
7:49PM
0.82
9:18AM
-0.42
8:42PM
0.91
10:21AM
-0.32
9:55PM
0.96
11:28AM
-0.21
11:27PM
0.94
12:34PM
-0.10
12:59AM
0.82
1:35PM
-0.00
2:16AM
0.63
2:28PM
0.10
3:18AM
0.41
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Sunrise6:31--6:30--6:28--6:26--6:24--6:24--6:22--
Sunset-7:59--8:00--8:00--8:01--8:02--8:04--8:05-
heavy rain
mod rain
light rain
rain showers
light rain
rain showers
clear
clear
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
Rain (mm)
22105432---------------
Temp. °C101112121211111111121312111110111111111111
Feels °C (?)9101091098810988998881010810
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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 16 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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