Surf Forecasts:
Third Reef surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 20 Aug, 5AM (local time) - 3ft (0.9m), 15s period, SSW swell with glassy winds.
- Most powerful swell: Sunday 23 Aug, 2PM (local time) - 6ft (1.8m), 8s period, NW swell with 364 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 5AM (local time) - 3ft (0.9m), 15s period with SSW 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 Thursday (Aug 20) at 5AM. The primary swell is predicted to be 0.9m and 15s period with a secondary swell of 0.9m and 12s. Another secondary swell of 1.1m and 7s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Third Reef in the next 16 days are 1.8m 8s and forecast to arrive on Sunday (Aug 23) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 14s period and expected on Monday (Aug 24) at 5PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 20th Aug) | 3ft (0.9m) 15s |
| Best Surf | 5AM (Thu 20th Aug) | 3ft (0.9m) 15s |
| Most Powerful | 2PM (Sun 23rd Aug) | 6ft (1.8m) 8s |
Table - best surf conditions forecast for Third Reef over the next 16 days.
The Lowdown
Alright, let’s get into it. The next couple of weeks are going to be a bit of a mixed bag, so let’s be real about what we’re working with. There’s a definite gap at the start with nothing worth paddling out for, so don’t rush to wax up just yet. But there’s a small window of promise if you’re patient and picky.
The first real chance we get is on Sunday afternoon, the 23rd of August. It’s not big, around 5ft, but the wind is dead calm and it’s glassy. That’s a huge plus. The swell is from the NW with a short 8-second period, so it’s a bit mushy and fatigue-inducing, not a lot of push. It’s a reef break, so that short period isn’t ideal, but the clean conditions will make it the best thing on offer for days. The energy is moderate at 495. It’s not a standout, but it’s the only time the ocean is really cooperating. Expect a few other folks out, but it’s not going to be a zoo.
After that, we slide back into a pretty poor run of conditions. The wind swings onshore and the surf quality drops way off. There’s a period from the 24th to the 31st where it’s mostly poor, with some marginal moments, but nothing worth your time. The swell stays small, the wind gets messy, and it’s just a grind.
Now, the one to circle on your calendar is Wednesday morning, September 2nd. This is the standout across the whole window. It’s still a week and a half out, so treat it as promising, not guaranteed, but the setup looks proper. The swell is 5ft from the W with a 9-second period, and the wind is totally glassy, calm. The water temp is about normal for this time of year, no weird anomalies. The combined energy is a solid 625, which means there’s some real push behind it. This is the cleanest, most powerful surf we’re going to see. The reef will be handling it well. This is your session. It’s not huge, but it will be clean, and that makes all the difference. The paddling out won’t be a struggle either due to the moderate period. Keep an eye on this one. The afternoon of that same day looks like it gets a bit cross-onshore, so get out early.
The final couple of days trail off into more average, choppy conditions with the wind messing things up again. There’s plenty of swell energy on the 28th (1127!) but the wind is all over it, making it messy and blown out. That’s more of a kite-surfing day than a clean paddle session.
So, to sum it up: don’t bother with the empty days, wait for that glassy Sunday afternoon if you’re desperate, but the real gem is the glassy Wednesday morning on the 2nd of September. That’s the one.
Rusty
Short Range ForecastMostly dry. Very mild (max 17°C on Sat afternoon, min 12°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Sat night, min 12°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||
Wave Height (m) Direction Period (s) | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 18 | SSW 13 | SW 19 | NW 8 | SW 18 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 |
Wave Graph | |||||||||||||||||||
314 | 233 | 223 | 236 | 178 | 139 | 99 | 99 | 111 | 94 | 231 | 247 | 244 | 255 | 192 | 186 | 219 | 214 | 161 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-on | glassy | on | on | cross-off | on | cross-on | cross-off | cross-on | glassy | glassy | cross | cross | glassy | on | cross-on | cross-off |
High Tide | 6:54AM1.14m | 5:29PM1.71m | 8:32AM1.16m | 6:29PM1.70m | 9:37AM1.22m | 7:32PM1.73m | 10:19AM1.28m | 8:30PM1.78m | 10:51AM1.35m | 9:19PM1.84m | 11:19AM1.42m | 10:05PM1.88m | |||||||
Low Tide | 00:11AM0.32m | 10:57AM0.96m | 1:18AM0.28m | 11:59AM1.05m | 2:21AM0.22m | 1:13PM1.08m | 3:15AM0.14m | 2:23PM1.05m | 4:00AM0.07m | 3:22PM0.98m | 4:38AM0.01m | 4:11PM0.89m | |||||||
— | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — | |
8:07 | — | 8:06 | — | — | 8:05 | — | — | 8:02 | — | — | 8:01 | — | — | 8:00 | — | — | 7:59 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 14 | 14 | 13 | 14 | 14 | 12 | 15 | 17 | 20 | 18 | 16 | 16 | 16 | 15 | 13 | 13 | 14 | 14 |
Feels °C | 13 | 14 | 12 | 13 | 13 | 13 | 11 | 13 | 14 | 17 | 15 | 15 | 15 | 15 | 14 | 13 | 12 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | SSW 13 | WNW 6 | NW 7 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 7 | SW 16 |
314 | 189 | 170 | 156 | 117 | 83 | 78 | 55 | 98 | 18 | 160 | 247 | 244 | 229 | 191 | 125 | 125 | 147 | 161 | |
Swell 2 Height (m) Direction Period (s) | WNW 12 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 18 | SSW 13 | SW 19 | SW 18 | S 16 | SW 18 | S 14 | S 14 | SW 16 | SW 16 | S 13 |
196 | 233 | 223 | 236 | 178 | 139 | 99 | 99 | 111 | 90 | 231 | 166 | 124 | 255 | 153 | 148 | 219 | 214 | 87 | |
Swell 3 Height (m) Direction Period (s) | NW 7 | NW 6 | SW 19 | NW 7 | NW 7 | NW 7 | NW 8 | NNW 8 | S 16 | SW 16 | SSW 15 | SSW 16 | SW 18 | S 14 | SW 18 | SW 17 | S 13 | S 13 | W 14 |
55 | 31 | 58 | 33 | 17 | 18 | 28 | 22 | 46 | 94 | 76 | 82 | 199 | 106 | 192 | 186 | 126 | 126 | 65 | |
Wind waves Height (m) Direction Period (s) | NW 7 | NW 6 | NW 6 | NW 7 | — | — | — | — | NW 4 | NNW 5 | — | — | — | — | — | — | — | — | NW 7 |
131 | 74 | 43 | 55 | — | — | — | — | 53 | 14 | — | — | — | — | — | — | — | — | 89 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 116 | 84 | 0 | 195 | 116 | 0 | 84 | 387 | 3 | 169 | 0 | 0 | 141 | 108 | 0 | 169 | 195 | 0 |
Best forecast wave conditions in Humboldt County | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











