Third Reef Surf Break

Lat Long: 40.03° N 124.08° W

Third Reef Surf Forecast and Surf Report

Issued: 4 pm 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Third Reef sea temperature is
15.4°C
1.0° 

Third Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Third Reef surf forecast from 13 Sep 2026:

  • Best quality surf: Monday 14 Sep, 2AM (local time) - 6ft (1.8m), 9s period, NW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 16 Sep, 2AM (local time) - 7ft (2.1m), 8s period, NW swell with 574 kJ wave energy.
  • Next surfable swell (1★+): Saturday 12 Sep, 11PM (local time) - 3ft (0.9m), 14s period with SW swell.

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 Saturday (Sep 12) at 11PM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 0.8m 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 16 days are 2.1m 8s and forecast to arrive on Wednesday (Sep 16) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 16s period and expected on Thursday (Sep 17) at 2PM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+)11PM (Sat 12th Sep)3ft (0.9m) 14s
Best Surf 2AM (Mon 14th Sep)6ft (1.8m) 9s
Most Powerful 2AM (Wed 16th Sep)7ft (2.1m) 8s

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


The Lowdown

Alright, Rusty here, and I'm not gonna sugarcoat it. The outlook for Third Reef is a real grind. For the next couple of weeks, we've got waves, but the wind is just our enemy—mostly cross-onshore or onshore, ruining what could be fun.

Let's kick off with Saturday afternoon, September 12. We’ve got a 3ft swell from the SW with a 14-second period—that's a long-period groundswell with moderate energy (525). But the wind is onshore from the WNW at 9 mph, and it's tagged as "poor surf conditions." Not the way you want to start.

Sunday the 13th morning is more of the same: 2ft and poor. The afternoon bumps up to 5ft from the WNW, but a fresh 19 mph cross-onshore from the NW makes it lumpy with strong energy (619). That's going to be a messy, blown-out wall.

Monday the 14th and Tuesday the 15th are a repeat: waves from 4ft to 7ft, but always with that cross-onshore wind. The energy is moderate to strong (424 to 757), but the quality is terrible. Tuesday afternoon gets a 2 out of 10 rating—marginal—but the wind is still cross-onshore.

Now, here's a little glimmer. Wednesday afternoon, September 16. We get glassy conditions, a light air from the WNW at just 3 mph. The swell drops to 4ft from the NW with an 8-second period. It's a short-period wind swell, so the waves will be a bit crumbly, but with no wind, it'll be clean. The report says "expect good surf conditions." This is your best bet in the whole outlook, but it's still only scoring a 2 out of 10, so don't get too excited. The water temp is about average for this time of year, around 60°, and the anomaly of 2° is noticeable but not wild.

Thursday the 17th afternoon is another one to note. The swell drops to 2ft, but it swings to the SSW with a very long 16-second period. That’s a proper groundswell, and the wind turns light cross-offshore from the S. It'll be clean, but tiny.

From Friday the 18th through the end of the outlook, it's a frustrating mix. We get some long-period SW groundswell (18-19 seconds) with moderate to strong energy (399 to 920), but the wind is almost always cross-onshore or onshore. Friday the 18th morning has a 2ft, 19-second SW swell with a light onshore wind, but it's still marginal. With that long period at a reef break like Third Reef, the waves might break too straight and be less fun than at a point break.

There are no true standouts here, folks. The Wednesday afternoon glass-off is the closest thing to a decent session, but it's small. For the experts, the bigger days (5ft to 7ft) might offer some power, but you'll be battling the chop. This is a "check the cams and be ready to be disappointed" kind of forecast.

Rusty, signing off.

Short Range Forecast

Mostly dry. Warm (max 21°C on Mon afternoon, min 11°C on Sun night). Winds increasing (light winds from the NNE on Sat night, fresh winds from the NNW by Mon afternoon).

Days 5-7 Weather Summary

Mostly dry. Very mild (max 16°C on Tue afternoon, min 12°C on Tue night). Wind will be generally light.

Sat
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
2
0
0
3
0
0
3
0
2
3
1
2
2
0
2
2
2
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
SW
14
0.9
SW
14
0.7
SW
14
1.5
WNW
9
1.8
NW
9
1.4
NW
8
2
NW
8
2
NW
8
1.3
NW
8
1.8
NW
8
2.1
NW
8
1.4
NW
8
1.3
NW
8
1.1
NW
8
0.9
NW
8
0.6
SSW
16
0.4
SW
21
0.6
SW
19
0.6
SW
19
0.6
SW
19
Wave Graph
Metric surfscale
Energy kJ
301
293
186
370
486
255
432
494
239
448
574
277
229
173
112
198
160
303
303
303
Wind (km/h)
15
WNW
10
NE
15
WNW
30
NW
15
NNE
15
NW
30
NNW
15
N
15
WNW
10
NNW
15
NNE
10
W
5
WNW
5
ENE
10
S
5
S
5
ESE
10
W
10
WNW
10
N
Wind State
on
cross-off
on
cross-on
cross-off
cross-on
cross-on
cross-off
cross-on
cross-on
cross-off
on
glassy
glassy
cross
cross-off
glassy
on
cross-on
cross
High Tide
1:13AM1.73m
1:19PM1.88m
2:03AM1.60m
1:51PM1.86m
2:55AM1.46m
2:22PM1.81m
3:52AM1.33m
2:57PM1.75m
5:01AM1.23m
3:36PM1.69m
6:33AM1.19m
4:27PM1.62m
Low Tide
7:03PM0.17m
7:09AM0.35m
7:47PM0.13m
7:41AM0.53m
8:33PM0.13m
8:13AM0.70m
9:22PM0.17m
8:45AM0.85m
10:16PM0.22m
9:22AM0.98m
11:19PM0.26m
10:14AM1.07m
00:27AM0.27m
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:54
6:56
6:56
6:58
6:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:30
7:28
7:27
7:24
7:22
7:22
7:20
 mm
Temp °C
15
15
16
18
16
18
21
16
17
16
16
16
15
16
16
16
14
15
14
13
Feels °C
12
13
13
13
12
15
15
13
15
14
14
14
14
15
14
15
14
14
13
12
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  • 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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