Third Reef Surf Break

Lat Long: 40.03° N 124.08° W

Third Reef Surf Forecast and Surf Report

Issued: 4 pm 13 Sep 2026 (local time)

Forecast update in  hr  min

Today's Third Reef sea temperature is
15.0°C
0.6° 

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 14 Sep 2026:

  • Best quality surf: Monday 14 Sep, 5AM (local time) - 6ft (1.8m), 9s period, NW swell with cross-offshore winds.
  • Most powerful swell: Sunday 20 Sep, 8PM (local time) - 3ft (0.9m), 19s period, SW swell with 577 kJ wave energy.
  • Next surfable swell (1★+): Monday 14 Sep, 5AM (local time) - 6ft (1.8m), 9s period with NW 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 Monday (Sep 14) at 5AM. The primary swell is predicted to be 1.8m and 9s period with a secondary swell of 1.3m and 9s. Another secondary swell of 0.6m and 13s is also forecast. 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 0.9m 19s and forecast to arrive on Sunday (Sep 20) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 17s period and expected on Thursday (Sep 17) at 11AM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Mon 14th Sep)6ft (1.8m) 9s
Best Surf 5AM (Mon 14th Sep)6ft (1.8m) 9s
Most Powerful 8PM (Sun 20th Sep)3ft (0.9m) 19s

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


The Lowdown

Alright folks, Rusty here. Let’s get into it. We’ve got a bit of a slow burn ahead here at Third Reef. The first week or so is gonna test your patience, but there’s a glimmer of something better waiting for us late in the window if you’re willing to wait.

Right off the bat, the next few days are pretty grim. We’ve got a persistent cross-onshore wind pattern chop things up with swell sitting mostly between 3.3 ft to 6.9 ft. That moderate wave energy (around 646 to 891 on the energy scale) suggests the ocean has some push, but it’s lumpy and messy. The water temp is sitting right around 59.0°, which is pretty normal for this time of year, so nothing unusual there for a dawny.

The first real chance to get excited doesn’t come until Thursday the 17th. The morning is still marginal with tiny 3.9 ft cross-shores, but then Thursday afternoon things switch. We see the wind go glassy and the swell from the SSW is only 2.0 ft, but with a very long period of 16 seconds. That’s classic groundswell energy (moderate energy at 487). For a reef like Third Reef, that long period swell can really wrap in and offer some clean, lined-up waves. It’s small, so it’s not a standout for power, but if you’ve got a log, that glassy afternoon session is the closest thing to nice we’ll see early on.

The next real standout gets promising around Tuesday the 22nd and into Wednesday the 23rd. On Tuesday afternoon, the swell bumps up to a solid 7.9 ft from the NW with a period of 12 seconds and strong energy (1801). The wind is still cross-onshore and light, which is workable, but the real magic looks to be Wednesday afternoon the 23rd. The swell drops slightly to a still solid 6.6 ft from the NW, but the wind shifts to a light cross-offshore from the SE. That will clean the surface right up, giving us some steep, hollow wedges on the reef. That’s the one to circle. The swell is in that expert-friendly zone over 6.6 ft, so if you’re not used to size, watch from the channel.

Thursday the 24th afternoon also looks tidy with a cross-offshore again, but the swell is a touch smaller and less consistent on the energy. The week two action then fades with more onshores and lumpy conditions creeping back in.

So, the long and short of it: if you’re desperate, the glassy Thursday the 17th session will scratch the itch. But the true highlight is Wednesday afternoon the 23rd with that clean, 6.6 ft NW swell and offshore winds. It’s a week and a half away, so keep your fingers crossed the forecast holds, but that's the one that could get the blood pumping.

Stay frothy.

Short Range Forecast

Mostly dry. Warm (max 20°C on Mon afternoon, min 12°C on Sun night). Winds decreasing (fresh winds from the NW on Sun afternoon, light winds from the NNE by Tue morning).

Days 5-7 Weather Summary

Mostly dry. Very mild (max 17°C on Fri morning, min 12°C on Wed night). Wind will be generally light.

Sun
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
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
2
0
1
0
0
1
2
1
2
2
2
2
2
0
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
NW
9
1.8
NW
9
1.5
NW
8
1.9
NW
7
1.3
NW
8
1.3
NW
8
1.8
NW
8
1.6
NW
8
2.1
NW
8
1.6
NW
8
1.2
NW
8
1.2
NW
8
0.6
SSW
16
0.4
SW
21
0.6
SW
19
0.6
SW
19
0.6
SW
19
0.7
SW
18
0.8
SW
18
0.8
SW
18
Wave Graph
Metric surfscale
Energy kJ
397
486
268
371
221
233
416
338
547
341
201
196
198
160
303
303
303
314
375
442
Wind (km/h)
30
NW
15
NNE
20
NW
30
NNW
15
N
15
WNW
15
NNW
15
N
15
WNW
10
WNW
0
ENE
10
S
5
SSW
10
NNE
10
W
10
NW
10
NNE
15
WNW
10
WNW
5
N
Wind State
cross-on
cross-off
cross-on
cross-on
cross-off
cross-on
cross-on
cross
cross-on
cross-on
glassy
cross
glassy
cross-off
on
cross-on
cross-off
cross-on
cross-on
glassy
High Tide
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
8:06AM1.21m
5:35PM1.58m
Low Tide
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
11:34AM1.11m
1:32AM0.25m
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
clear
part cloud
clear
clear
part cloud
clear
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:56
6:56
6:58
6:58
7:00
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:28
7:27
7:24
7:22
7:22
7:20
7:17
 mm
Temp °C
18
16
18
20
16
17
17
16
15
15
13
15
16
14
17
16
15
15
15
14
Feels °C
12
12
14
14
13
15
15
13
12
13
13
14
15
15
16
15
15
13
14
15
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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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