
Surf Forecasts:
Third Reef surf forecast from 4 Aug 2026:
- Best quality surf: Friday 7 Aug, 8PM (local time) - 5ft (1.6m), 7s period, NW swell with glassy winds.
- Most powerful swell: Tuesday 11 Aug, 11AM (local time) - 8ft (2.5m), 9s period, NW swell with 937 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 5PM (local time) - 4.5ft (1.3m), 8s 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 Tuesday (Aug 04) at 5PM. The primary swell is predicted to be 1.3m and 8s period with a secondary swell of 0.4m and 15s. 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 2.5m 9s and forecast to arrive on Tuesday (Aug 11) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 13s period and expected on Monday (Aug 10) at 11PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Tue 4th Aug) | 4.5ft (1.3m) 8s |
| Best Surf | 8PM (Fri 7th Aug) | 5ft (1.6m) 7s |
| Most Powerful | 11AM (Tue 11th Aug) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Third Reef over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cookin’ for Third Reef over the next couple of weeks.
The first couple of days are actually pretty promising, then we hit a long, ugly stretch of onshore junk before things clean up again in the second week. Keep your eyes on Tuesday afternoon and that far-off window around the 14th and 15th – those are the real standouts.
Tuesday morning, August 4th, kicks things off with some waist-to-chest high waves around 5 ft out of the NW. The combined energy is solid, sitting at 443 (moderate), and the 9-second period means it’s got a bit of push. The water’s running a bit colder than normal for this time of year, sitting at 55°F with a 3°F anomaly, so you’ll want a good steamer. The wind’s light and cross-off from the SSE at 6 mph, so it’ll be pretty clean. Not a bad way to start.
But the real gem is Tuesday afternoon, August 4th. The wind goes glassy, straight up WSW at just 3 mph, and you’re looking at 4 ft of NW swell. The wave energy is still moderate at 349, but that glassy surface is a major plus. That’s the session you wanna be in the water for.
Wednesday, August 5th, is a step down. The swell drops to 3 ft and the wind goes cross from the S at 6 mph. It’s marginal, with combined energy dropping to 247. Still rideable if you’re keen, but nothin’ to write home about. Thursday the 6th is a write-off – tiny, weak swell and onshore wind.
Then from Friday the 7th all the way through to Tuesday the 11th, it’s mostly poor. The wind is stuck cross-onshore from the NW or NNW, blowing 9 to 15 mph. The swell tries to build again – by Monday the 10th we’re seeing 7 ft of NW at 9 seconds, and combined energy hits 964 (moderate to strong) – but it’s all chopped up and messy. On Tuesday the 11th, the swell peaks at 8 ft with a huge energy reading of 1588 (strong), but again, the wind’s trash. That’s expert-only territory if you’re brave, but honestly, it looks more like a kitesurfing day than a paddle session.
Wednesday the 12th through Friday the 14th morning is still mostly marginal, with cross-onshore winds and chest-high NW swell in the 5 ft to 6 ft range. The energy stays moderate to strong.
Then, finally, the light at the end of the tunnel. Friday afternoon, August 14th, the wind goes glassy again. You’ve got 5 ft of NW swell, period stretching to 10 seconds, and a combined energy of 821 (moderate). The forecast calls for very good conditions. That’s a standout.
And Saturday, August 15th afternoon, is another beauty. The swell drops a bit to 3 ft, but it’s long-period SSW groundswell at 16 seconds, with a huge energy reading of 922 (strong). The wind is glassy from the NW at just 3 mph. Those long-period swells love a reef setup like Third Reef, and this one should produce some proper shaped waves, though the sets will be more spaced out.
Sunday the 16th afternoon keeps the run going – glassy, calm wind, 3 ft of SSW groundswell, period 16 seconds, and combined energy 781 (moderate). Another very good call. After that, Monday and Tuesday the 17th and 18th fade back to small and marginal, and Wednesday the 19th brings another pulse of short-period NW windswell with poor winds.
So, in short: Tuesday afternoon, August 4th, is your early call, and Friday afternoon the 14th through Sunday the 16th is the best run of clean, long-period surf in the second week. That’s what you wait for.
Rusty
Short Range ForecastMostly dry. Very mild (max 18°C on Tue morning, min 13°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Sat afternoon, min 12°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | |||||||||||||||
AM | PM | 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) | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | SW 14 | SW 13 | SW 13 | SSW 13 | NW 7 | SSW 18 | NW 7 | SSW 17 | NW 7 | NW 8 | NW 8 | NW 8 | NW 9 | NW 9 | NW 9 | NW 9 |
Wave Graph | |||||||||||||||||||||
343 | 256 | 149 | 129 | 107 | 95 | 87 | 85 | 113 | 132 | 133 | 241 | 235 | 336 | 216 | 398 | 596 | 384 | 475 | 703 | 497 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | glassy | cross | cross | glassy | on | cross-on | glassy | cross-on | glassy | cross | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross |
High Tide | 3:54PM1.81m | 4:39AM1.25m | 4:34PM1.87m | 6:09AM1.15m | 5:24PM1.94m | 7:52AM1.15m | 6:25PM2.00m | 9:17AM1.22m | 7:32PM2.07m | 10:17AM1.32m | 8:38PM2.14m | 11:04AM1.42m | 9:40PM2.20m | ||||||||
Low Tide | 9:20AM0.47m | 10:44PM0.37m | 9:57AM0.64m | 11:53PM0.24m | 10:43AM0.80m | 1:04AM0.09m | 11:43AM0.93m | 2:13AM-0.06m | 12:59PM1.00m | 3:17AM-0.21m | 2:19PM1.00m | 4:13AM-0.33m | 3:32PM0.93m | ||||||||
6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | |
— | 8:27 | — | — | 8:24 | — | — | 8:23 | — | — | 8:22 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 16 | 15 | 14 | 16 | 15 | 14 | 15 | 15 | 17 | 16 | 16 | 18 | 26 | 24 | 20 | 25 | 20 | 18 | 21 | 19 |
Feels °C | 17 | 15 | 15 | 13 | 15 | 15 | 13 | 14 | 14 | 16 | 15 | 15 | 16 | 22 | 20 | 16 | 20 | 16 | 15 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | WNW 9 | WNW 8 | SW 13 | NW 8 | NW 7 | SW 13 | NW 7 | SSW 17 | SSW 18 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 |
343 | 256 | 149 | 129 | 107 | 70 | 40 | 85 | 45 | 75 | 80 | 105 | 235 | 240 | 146 | 288 | 196 | 167 | 120 | 163 | 60 | |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 15 | NW 10 | NW 10 | SW 14 | NNW 8 | SW 13 | WNW 8 | SSW 13 | SW 13 | SSW 18 | SSW 13 | SW 12 | SW 12 | NW 10 | SW 12 | SSW 12 | SSW 11 | SW 21 | SW 20 | SW 20 |
86 | 79 | 25 | 45 | 99 | 43 | 87 | 28 | 113 | 57 | 133 | 109 | 37 | 21 | 52 | 37 | 28 | 25 | 67 | 98 | 97 | |
Swell 3 Height (m) Direction Period (s) | SSW 12 | SSW 12 | SW 15 | SW 14 | WNW 9 | SW 14 | NNW 8 | NNW 8 | SW 18 | SW 18 | S 12 | SW 16 | NW 12 | W 13 | SSW 12 | SW 23 | W 12 | SW 21 | SSW 11 | S 10 | SW 16 |
14 | 14 | 56 | 73 | 30 | 95 | 23 | 23 | 82 | 80 | 11 | 133 | 34 | 31 | 56 | 21 | 12 | 72 | 12 | 2 | 39 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 8 | NW 8 | NW 8 | NW 9 | NW 9 | NW 9 | NW 9 |
— | — | — | — | — | — | — | — | — | 132 | 100 | 241 | 137 | 336 | 216 | 398 | 596 | 384 | 475 | 703 | 497 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 138 | 120 | 0 | 138 | 243 | 0 | 195 | 0 | 3 | 195 | 729 | 3 | 211 | 386 | 3 | 243 | 386 | 3 |
Best forecast wave conditions in Humboldt County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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.











