Surf Forecasts:
Number Threes surf forecast from 12 Aug 2026:
- Best quality surf: Monday 17 Aug, 5AM (local time) - 6.5ft (2.0m), 8s period, ENE swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 11AM (local time) - 16ft (5.0m), 11s period, E swell with 5,738 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 5AM (local time) - 6.5ft (2.0m), 8s period with ENE swell.
Best Forecast Surf Conditions for Number Threes this week:
The surf forecast for Number Threes over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 5AM. The primary swell is predicted to be 2.0m and 8s period with a secondary swell of 0.9m and 15s. Another secondary swell of 1.1m and 6s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Number Threes in the next 16 days are 5.0m 11s and forecast to arrive on Sunday (Aug 16) 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 1.6m 6s period and expected on Wednesday (Aug 12) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 17th Aug) | 6.5ft (2.0m) 8s |
| Best Surf | 5AM (Mon 17th Aug) | 6.5ft (2.0m) 8s |
| Most Powerful | 11AM (Sun 16th Aug) | 16ft (5.0m) 11s |
Table - best surf conditions forecast for Number Threes over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on the cards for Number Threes over the next couple of weeks. I’ll be straight with you – it’s a bit of a mixed bag, and we’ve got a real dry spell to work through before anything worthwhile shows up.
The first few days are a tough watch. We’ve got some clean, cross-off conditions from the ENE, but the swell is just too weak and messy to get excited about. The wave energy is low, sitting around the 800 to 900 mark (moderate energy), and the swell periods are all over the place. It’s marginal at best, and honestly, not worth paddling out for.
We hit a real rough patch from the 14th of August. Friday afternoon sees a 7ft ENE swell, but the period drops to a tiny 8 seconds and the wind is a strong 25 mph from the NE – it’s just poor conditions. Saturday is even worse: a 10ft ENE swell but with a 28-31 mph NE wind, making it messy and blown out. The energy jumps to 2166 (strong) on Saturday morning, but the wind is a near gale by the afternoon. Sunday the 16th is a write-off with a 16ft E swell, but it’s coming with a strong cross-onshore SE wind and a risk of thunderstorms. The wave energy is 6108 (very strong), but it’s just a chaotic, dangerous mess. This is strictly for the experts, and honestly, more of a kite surf session than a paddle surf one.
Things start to settle down from the 17th of August. Monday morning gives us a 6ft ENE swell, with a moderate breeze, and a period of 8 seconds. The energy is 1074 (strong), but it’s still a little short-period and only scores a 3 out of 10. It’s a step up, but it’s not a standout.
The real winner, the one you’ve been waiting for, is the 23rd and 24th of August. The swell swings around to the SSW, matching the optimum for Number Threes. On Sunday the 23rd afternoon, we’ve got a 3ft SSW swell with a period of 15 seconds – that’s proper groundswell, long and powerful. The wind is light from the NE at 6 mph, which is cross-off. It’s clean. The energy is 316 (moderate), but the quality is there.
Then Monday the 24th morning is the pick of the entire forecast. The swell is 3ft from the SSW, with a 13-second period, and the wind is glassy – a dead calm 3 mph from the SSW. That’s as good as it gets for clean surf. The wave energy is 488 (moderate). The water temperature is about average for the time of year, so no wetsuit surprises there. This is a point break and reef setup, so that long period groundswell will wrap in nicely. The crowd profile at Number Threes is “often” busy, so expect a few heads out for these clean windows.
There’s another decent-looking window on the 26th of August. Wednesday morning gives us a 3ft SSW swell, a 13-second period, and a light cross-shore from the E. The energy is 594 (moderate), and it’s clean. The afternoon session on the 26th is even better, with a 2ft S swell, a 17-second period – that’s very long period groundswell – and a light cross-off E wind. The energy is 525 (moderate), and conditions are described as “very good.” That’s another one to circle on the calendar.
So, to sum it up: the first week and a half are grim, with a big gap of no-good surf until the 23rd of August. The standout is the 24th of August morning with glassy conditions and a clean SSW groundswell at Number Threes. The 26th of August also looks very promising. It’s a waiting game, but when it comes, it’ll be worth it.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Thu morning, min 25°C on Tue night). Mainly strong winds. | Days 5-7 Weather SummaryHeavy rain (total 37mm), heaviest during Sat night. Warm (max 27°C on Sat afternoon, min 25°C on Fri night). Winds decreasing (gales from the ENE on Sat night, light winds from the ENE by Sun night). | ||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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) | S 20 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | ENE 7 | ENE 8 | E 8 | ENE 11 | ENE 9 | E 9 | E 11 | E 9 | ENE 8 | ENE 8 | ENE 8 | ENE 7 |
Wave Graph | |||||||||||||||||||
276 | 509 | 498 | 520 | 501 | 662 | 537 | 444 | 502 | 775 | 1932 | 1701 | 1978 | 5738 | 1672 | 621 | 463 | 356 | 231 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross | cross-off | cross-off | cross-off |
High Tide | 3:43AM0.31m | 4:13PM0.75m | 4:30AM0.36m | 4:48PM0.69m | 5:17AM0.40m | 5:22PM0.62m | 6:06AM0.44m | 5:54PM0.53m | 6:57AM0.47m | 6:24PM0.45m | 7:54AM0.49m | 6:52PM0.37m | |||||||
Low Tide | 10:40PM0.05m | 9:08AM-0.00m | 11:08PM0.04m | 9:58AM0.03m | 11:36PM0.04m | 10:49AM0.08m | 00:03AM0.04m | 11:43AM0.14m | 00:30AM0.05m | 12:43PM0.20m | 00:58AM0.06m | 1:59PM0.25m | 1:27AM0.08m | ||||||
— | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
7:04 | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 20 | 8 | 5 | 3 | — | — | — |
Temp °C | 26 | 26 | 26 | 25 | 27 | 27 | 25 | 26 | 27 | 25 | 26 | 27 | 26 | 27 | 27 | 26 | 26 | 26 | 25 |
Feels °C | 25 | 24 | 23 | 23 | 24 | 24 | 23 | 23 | 24 | 22 | 23 | 23 | 22 | 25 | 26 | 27 | 29 | 26 | 23 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 16 | S 13 | ENE 8 | ENE 8 | ENE 8 | S 13 |
243 | 509 | 498 | 520 | 501 | 662 | 537 | 411 | 411 | 306 | 222 | 168 | 176 | 333 | 160 | 621 | 463 | 356 | 222 | |
Swell 2 Height (m) Direction Period (s) | S 20 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | W 12 | W 11 | W 12 | ESE 12 | W 11 | W 11 | W 13 | S 18 | W 12 | S 16 | SSE 7 | S 14 | S 14 | W 11 |
276 | 218 | 218 | 222 | 113 | 11 | 10 | 11 | 50 | 21 | 21 | 30 | 56 | 25 | 127 | 93 | 334 | 260 | 10 | |
Swell 3 Height (m) Direction Period (s) | SSE 9 | W 13 | W 12 | W 12 | W 12 | SW 19 | SW 18 | SW 18 | W 12 | SSW 17 | SW 17 | S 19 | W 13 | SSW 19 | W 12 | S 14 | SSE 6 | SSE 6 | WSW 5 |
7 | 30 | 25 | 25 | 11 | 14 | 13 | 12 | 11 | 29 | 12 | 65 | 30 | 37 | 25 | 246 | 20 | 13 | 2 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 6 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 | E 8 | ENE 11 | ENE 9 | E 9 | E 11 | E 9 | SSE 7 | ENE 8 | — | ENE 7 |
181 | 165 | 141 | 194 | 195 | 227 | 373 | 444 | 502 | 775 | 1932 | 1701 | 1978 | 5738 | 1672 | 154 | 257 | — | 231 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 31 | 31 | 40 | 31 | 31 | 126 | 34 | 45 | 155 | 202 | 202 | 202 | 201 | 150 | 46 | 1 | 31 | 31 | 31 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Number Threes Surf forecast
The above surf forecast table for Number Threes provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Number Threes can be found by selecting the local surf guide option on the grey menu. Our Number Threes 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 (Number Threes) 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 Number Threes 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.
Number Threes is 5 km (3 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.











