
Surf Forecasts:
Number Threes surf forecast from 9 Aug 2026:
- Most powerful swell: Saturday 15 Aug, 8PM (local time) - 13ft (4.0m), 9s period, ENE swell with 2,601 kJ wave energy.
Best Forecast Surf Conditions for Number Threes this week:
The most powerful waves expected at Number Threes in the next 16 days are 4.0m 9s and forecast to arrive on Saturday (Aug 15) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Sunday (Aug 09) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sat 15th Aug) | 13ft (4.0m) 9s |
Table - best surf conditions forecast for Number Threes over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s coming up at Number Threes. It’s a solid, exposed reef break for advanced surfers only, and it’s usually consistent. With the water sitting at 81°, that’s about average for this time of year, so nothing unusual to report there.
Right off the bat, Saturday the 8th and Sunday the 9th are a write-off. Small, weak swell and a fresh cross-off breeze keep it messy. We’re looking at a bit of a slow start, but don’t get disheartened.
Monday the 10th and Tuesday the 11th are still pretty marginal. The swell is small, around 5 to 5 feet from the east-northeast, with a short period of 7 seconds, so not much punch. The wind stays fresh and cross-off, keeping the surface clean enough to look at, but the energy is just not there yet.
Things start to get interesting from Wednesday the 12th into Thursday the 13th. A longer period swell from the south and south-southeast creeps in, around 3 to 4 feet, but with periods stretching to 15 to 18 seconds. That’s proper groundswell, meaning longer waits between sets, but the waves will have a lot more shape and push. The combined wave energy is climbing into the moderate range, hitting 900 to 1000 (1088). The wind stays a steady cross-off, so it’ll be clean. It’s not huge, but for a reef like this, those long lines will be worth paddling out for. Thursday morning is the peak of this window with the best score we’ll see in the first week.
Now, hold on to your board for the second week. Friday the 14th and Saturday the 15th see a big jump in size. The swell pumps up to 8 to 12 feet from the east-northeast, period is still short at 8 to 9 seconds, so it’ll be a lot of raw, chunky energy. The combined energy goes ballistic, hitting over 2000 to 2700 (2762). That’s strong to very strong wave energy. This is big, powerful surf. The wind is fresh to strong from the northeast and east-northeast, holding cross-off, which will keep the face reasonably clean. This is expert territory, no doubt. This Friday the 14th and Saturday the 15th are the standout days for the whole outlook. If you’re advanced and hungry, that’s your window.
Sunday the 16th turns nasty. Heavy rain and a near gale from the north-northwest shift it to offshore, but at 34 mph, it’s near gale offshore and very hard to paddle into. The swell is still 12 feet, but the conditions will be dangerous and ugly. Leave it.
Monday the 17th sees the wind ease to a gentle cross-on from the southeast, which chops it up a bit. Swell drops to 7 feet. Not great, but Monday afternoon the wind swings east cross-off and becomes moderate, cleaning it up for marginal 6 feet waves.
From Tuesday the 18th through to the end of the period on Sunday the 23rd, it’s a slow fade. Swell drops from 6 feet down to 2 feet, with periods mostly short at 6 to 8 seconds. The wind stays cross-off from the east-northeast, keeping it clean, but the energy is weak and the waves are small. There are a few sessions around Tuesday the 18th afternoon and Friday the 21st that might offer a little something, but nothing to get excited about. The run of poor to marginal surf stretches for several days here, so don’t expect much.
Bottom line: The first week is a slow burner, with Thursday the 13th morning being the best of a modest bunch. The real standout is Friday the 14th and Saturday the 15th – big, powerful, clean cross-off surf for experts only. After that, it fizzles out.
- Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Sun afternoon, min 25°C on Sat night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Thu morning, min 25°C on Tue night). Mainly strong winds. | |||||||||||||||||||
Sat 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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) | SW 18 | SW 18 | ENE 7 | ENE 8 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | SSW 14 | S 20 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | ENE 8 | ENE 8 | E 8 |
Wave Graph | ||||||||||||||||||||
154 | 150 | 225 | 288 | 278 | 251 | 259 | 208 | 208 | 269 | 276 | 509 | 498 | 890 | 734 | 662 | 537 | 675 | 960 | 1379 | |
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-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 00:59AM0.19m | 2:10PM0.78m | 2:02AM0.22m | 2:54PM0.80m | 2:55AM0.26m | 3:35PM0.79m | 3:43AM0.31m | 4:13PM0.75m | 4:30AM0.36m | 4:48PM0.69m | 5:17AM0.40m | 5:22PM0.62m | ||||||||
Low Tide | 9:09PM0.12m | 6:20AM-0.01m | 9:40PM0.08m | 7:20AM-0.02m | 10:10PM0.06m | 8:15AM-0.02m | 10:40PM0.05m | 9:08AM-0.00m | 11:08PM0.04m | 9:58AM0.03m | 11:36PM0.04m | 10:49AM0.08m | 00:03AM0.04m | |||||||
— | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | |
7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 26 | 27 | 26 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 26 |
Feels °C | 23 | 23 | 24 | 25 | 26 | 26 | 25 | 25 | 25 | 24 | 22 | 24 | 23 | 24 | 24 | 24 | 24 | 22 | 22 | 24 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | E 7 | SSW 17 | SSW 12 | SSW 16 | SSW 15 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 |
101 | 89 | 159 | 86 | 223 | 184 | 191 | 186 | 165 | 269 | 243 | 509 | 498 | 890 | 734 | 662 | 537 | 411 | 333 | 239 | |
Swell 2 Height (m) Direction Period (s) | SW 18 | SSW 13 | SSW 13 | SSW 16 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSE 9 | S 20 | SSW 13 | SSW 13 | W 12 | W 12 | W 12 | W 11 | E 13 | W 12 | W 11 |
154 | 99 | 96 | 102 | 56 | 56 | 49 | 23 | 40 | 16 | 276 | 222 | 218 | 11 | 11 | 11 | 10 | 31 | 11 | 9 | |
Swell 3 Height (m) Direction Period (s) | SSE 10 | SW 18 | SSE 10 | SSW 18 | W 11 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | S 21 | SSE 8 | W 13 | W 12 | S 20 | SE 10 | SW 19 | SW 18 | W 12 | SSW 18 | SSE 15 |
19 | 150 | 19 | 102 | 20 | 19 | 18 | 17 | 16 | 79 | 7 | 30 | 25 | 8 | 4 | 14 | 13 | 11 | 30 | 22 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | NE 7 | ENE 7 | ENE 8 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | E 8 |
146 | 100 | 225 | 288 | 278 | 251 | 259 | 208 | 208 | 188 | 194 | 165 | 188 | 335 | 350 | 360 | 345 | 675 | 960 | 1379 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 39 | 31 | 31 | 39 | 31 | 31 | 31 | 31 | 31 | 33 | 31 | 31 | 39 | 31 | 40 | 45 | 32 | 45 | 126 | 45 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
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)
Latest Updates
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.











