Surf Forecasts:
Number Threes surf forecast from 15 Aug 2026:
- Best quality surf: Sunday 16 Aug, 8PM (local time) - 6.5ft (2.0m), 8s period, ENE swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 2AM (local time) - 18ft (5.5m), 11s period, ENE swell with 6,455 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 8PM (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 Sunday (Aug 16) at 8PM. The primary swell is predicted to be 2.0m and 8s period with a secondary swell of 1.1m and 7s. 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 5.5m 11s and forecast to arrive on Sunday (Aug 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 0.9m 6s period and expected on Thursday (Aug 20) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sun 16th Aug) | 6.5ft (2.0m) 8s |
| Best Surf | 8PM (Sun 16th Aug) | 6.5ft (2.0m) 8s |
| Most Powerful | 2AM (Sun 16th Aug) | 18ft (5.5m) 11s |
Table - best surf conditions forecast for Number Threes over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. Let’s break down the next couple of weeks at Number Threes. It’s a real mixed bag, so let’s get into it.
First, the water is sitting at 81°F, which is about average for the time of year, so nothing crazy there. This is a proper, consistent reef break that’s exposed to the open ocean.
The next few days are going to be a write-off. We have some bigger, but junky, east-northeast windswell on Friday the 14th with 2.2m (7ft) waves. The problem is that 40 km/h (25 mph) wind is going to put a nasty chop on top of everything. The wave energy is moderate at 1028, but the quality is just nonexistent. It gets worse over the weekend, with swell jumping to 3.5m (12ft), but those near-gale force winds absolutely kill it. This is more for the kite crew than the surf crew. The energy is strong, like 1802 on Saturday morning, but it’s all for nothing.
After that, the bottom falls out. From Monday the 17th right through to the 23rd, we’re looking at tiny, mostly sub-1m (3ft) leftovers. There is a glimmer on Monday the 17th with a 0.9m (3ft) south swell, but the fresh cross-off wind isn't going to make it magic. The energy is weak, in the 200-600 range. It’s a flat spell, pure and simple. You’d be paddling for the exercise, not the waves.
Now, for the good stuff. Things start to look up on Monday the 24th with a pulse of east-northeast windswell at 1.6m (5ft) and clean, cross-off winds. The energy is moderate at 598, but it’s a start. That swell holds through Tuesday the 25th at 1.8m (6ft) with clean conditions.
But the real standout is the end of the window. Circle Thursday the 27th of August on your calendar. That’s when a proper groundswell starts to fill in from the east. By Thursday afternoon, we're looking at 1.3m (4ft) of east swell with a 17-second period, light offshore winds, and the energy jumps to 1568. This is the one. It’s going to be clean and lined-up. Friday the 28th looks nearly as good, with 1.3m (4ft) of east swell at a 16-second period, gentle offshore breezes, and energy at 1592. This long-period stuff is great for a reef like this, as it will hold its shape perfectly.
This is the good stuff in the second week, but it's over a week away, so call it promising, not a guarantee. Just be aware this spot can get crowded, especially when it’s good. Expect some company if you paddle out there.
So, the plan is simple: you can sit out this weekend and the early part of next week. Save your energy. The real surf is out there on the horizon, and it’s heading our way.
Rusty out.
Short Range ForecastHeavy rain (total 30mm), heaviest during Sun morning. Warm (max 27°C on Sun afternoon, min 25°C on Fri night). Winds decreasing (gales from the E on Sat night, light winds from the ENE by Sun night). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Mon afternoon, min 24°C on Wed night). Mainly fresh winds. | |||||||||||||||||||
Fri 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
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) | ENE 8 | ENE 8 | ENE 8 | E 10 | ENE 11 | ENE 9 | ENE 8 | ENE 8 | S 14 | S 14 | ENE 7 | S 13 | S 13 | ENE 8 | ENE 8 | E 8 | ENE 7 | SSW 18 | SSW 17 | SW 16 |
Wave Graph | ||||||||||||||||||||
555 | 984 | 1565 | 2407 | 6455 | 1297 | 676 | 408 | 334 | 260 | 170 | 165 | 119 | 143 | 163 | 100 | 193 | 207 | 200 | 274 | |
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-on | cross | 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 |
High Tide | 5:22PM0.62m | 6:06AM0.44m | 5:54PM0.53m | 6:57AM0.47m | 6:24PM0.45m | 7:54AM0.49m | 6:52PM0.37m | 8:59AM0.51m | 7:16PM0.30m | 10:13AM0.53m | 11:25AM0.56m | 10:11PM0.21m | ||||||||
Low Tide | 00:03AM0.04m | 11:43AM0.14m | 00:30AM0.05m | 12:43PM0.20m | 00:58AM0.06m | 1:59PM0.25m | 1:27AM0.08m | 3:56PM0.27m | 2:01AM0.10m | 2:47AM0.12m | 8:27PM0.20m | |||||||||
— | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | |
7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | |
mm | — | — | 1 | — | 8 | 15 | 4 | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 26 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 22 | 23 | 23 | 21 | 22 | 22 | 26 | 28 | 24 | 25 | 24 | 23 | 24 | 25 | 24 | 25 | 25 | 26 | 26 | 28 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 13 | S 13 | S 14 | ENE 9 | ENE 8 | ENE 8 | S 14 | S 14 | ENE 7 | S 13 | S 13 | S 13 | SW 16 | E 8 | E 8 | E 8 | E 8 | ENE 8 |
411 | 306 | 225 | 168 | 184 | 1297 | 676 | 408 | 334 | 260 | 158 | 165 | 119 | 116 | 129 | 84 | 82 | 74 | 90 | 173 | |
Swell 2 Height (m) Direction Period (s) | E 11 | W 11 | W 11 | W 13 | S 18 | S 13 | SSE 7 | S 14 | S 6 | SSE 5 | S 13 | SW 17 | SW 18 | SW 18 | S 12 | SSW 16 | NE 6 | NE 7 | NNE 7 | SW 16 |
62 | 9 | 9 | 30 | 56 | 157 | 203 | 246 | 16 | 10 | 170 | 74 | 80 | 79 | 44 | 100 | 61 | 46 | 41 | 274 | |
Swell 3 Height (m) Direction Period (s) | W 12 | SSW 17 | SW 17 | S 16 | W 13 | S 16 | S 13 | SSE 6 | WSW 5 | SSW 19 | E 9 | W 13 | W 13 | W 12 | NNE 7 | S 12 | SW 16 | SSW 18 | SSW 17 | S 15 |
11 | 29 | 12 | 43 | 30 | 188 | 166 | 41 | 3 | 37 | 25 | 14 | 31 | 25 | 9 | 45 | 129 | 207 | 200 | 38 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | E 10 | ENE 11 | SSE 7 | SSE 7 | — | ENE 8 | ENE 7 | — | ENE 7 | ENE 7 | ENE 8 | ENE 8 | NE 7 | ENE 7 | — | — | — |
555 | 984 | 1565 | 2407 | 6455 | 222 | 334 | — | 250 | 231 | — | 164 | 99 | 143 | 163 | 44 | 193 | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 126 | 202 | 128 | 202 | 202 | 126 | 46 | 0 | 32 | 31 | 31 | 31 | 1 | 31 | 1 | 1 | 1 | 1 | 1 | 0 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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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.











