
Surf Forecasts:
Number Fours surf forecast from 11 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 8PM (local time) - 8ft (2.4m), 11s period, ENE swell with 1,292 kJ wave energy.
Best Forecast Surf Conditions for Number Fours this week:
The most powerful waves expected at Number Fours in the next 16 days are 2.4m 11s and forecast to arrive on Sunday (Aug 16) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 12s period and expected on Thursday (Aug 13) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sun 16th Aug) | 8ft (2.4m) 11s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
What’s up crew, Rusty here. Can’t lie, the next couple of weeks are looking pretty shabby. We’ve got a run of messy, low quality surf, and nothing is lining up to get your pulse racing.
The dry spell kicks off from Monday the 10th with an ENE windswell that’s just not doing anything for us. Small, short period, and onshore wind. It’s not a day to bring a good board, it’s a day to wait.
Tuesday and Wednesday remain much the same, with a hopeful south groundswell flaring up but then immediately crashing down due to longer periods but no actual size. The energy readings are in the 800-900 range, but the height is a measly one meter. It’s all wash, no go.
Thursday brings a touch more size but is still messy, and Friday is the same story, just a small short-period ENE swell. By the 15th, things get bigger but are still very poor. We’re looking at a 2.2m wave in the afternoon, but the period is a brisk 9 seconds and the wind is cross-off. It’s going to be a walled-up mess.
Then we get to Sunday, where the wind is howling onshore at 65 km/h. It’s big, 2.4m, but it’s onshore junk. This is a wash. The energy for these two days is strong, around 1100-1485, but the quality is non-existent.
Monday the 17th is the only day that might have a bit of life, but it's still snappy. The ENE swell with a period of 11 seconds and the sea is around 2.3m with light cross-swelling. The energy is high, but those long period swells often just barrel of the reef with no shape. It’s a busy, bumpy day, not a satisfying wave.
After that, we drop off a cliff. Tuesday to Sunday of the following week looks small and weak. Most days are a struggle to get over 1.1m, and the energy fades away. There will be some small south pulses from the 18th-21st, but they’re short-lived and with zero push.
The 22nd sees a little pulse begin to form but again, the period is tiny and it's more of the same thing. We get another small spike on the 24th but again it's not something to get excited about.
Finally, the late forecast for the 25th shows a more promising south over the reef with a nice 17-second period. The energy gets a bit of legs, but it’s still in the marginal zone. It’s window dressing.
The water temp is 27°, which is about 0.6° above average. Nothing to complain about there.
So, there you have it. If I were to pick days to even look at the ocean, it’s Monday the 17th and possibly the 25th, but both are far from being good. With the ENE wind being the constant, this barren spell seems like it’ll last for a few more days. We’ll just have to ride it out and dust off the shortboard for a while.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 25°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 35mm), heaviest during Sat night. Warm (max 27°C on Thu morning, min 25°C on Thu night). Winds increasing (fresh winds from the NE on Thu morning, near gales from the NNW by Sat night). | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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) | ENE 8 | ENE 8 | SSW 15 | ENE 7 | SSW 14 | S 20 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | ENE 7 | ENE 7 | ENE 8 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | ENE 11 |
Wave Graph | |||||||||||||||||||||
210 | 176 | 186 | 181 | 269 | 276 | 509 | 498 | 520 | 501 | 662 | 537 | 416 | 375 | 547 | 588 | 831 | 940 | 1156 | 1198 | 1146 | |
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 | on | on | cross-on |
High Tide | 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 | 6:06AM0.44m | 5:54PM0.53m | 6:57AM0.47m | 6:24PM0.45m | ||||||||
Low Tide | 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 | 11:43AM0.14m | 00:30AM0.05m | 12:43PM0.20m | 00:58AM0.06m | ||||||||
6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
— | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 35 | 5 | 11 | 2 |
Temp °C | 26 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 27 | 27 | 25 | 26 | 26 | 25 | 26 | 27 | 26 | 26 | 26 | 26 |
Feels °C | 26 | 25 | 26 | 25 | 24 | 23 | 24 | 24 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 26 | 22 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | 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 | S 13 | S 13 | S 13 | S 13 | S 13 | S 14 |
184 | 176 | 186 | 165 | 269 | 243 | 509 | 498 | 520 | 501 | 662 | 537 | 416 | 333 | 243 | 225 | 168 | 167 | 155 | 160 | 188 | |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SSW 11 | SSE 9 | SSW 11 | SSE 9 | S 20 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | W 12 | W 11 | W 12 | W 12 | W 11 | W 11 | S 16 | S 18 | S 16 | S 16 | S 16 |
56 | 42 | 17 | 41 | 16 | 276 | 218 | 218 | 170 | 113 | 11 | 10 | 11 | 11 | 21 | 9 | 42 | 56 | 132 | 127 | 81 | |
Swell 3 Height (m) Direction Period (s) | SSE 10 | SSE 10 | SSW 11 | SSE 9 | S 21 | SSE 9 | W 13 | W 12 | W 12 | W 12 | SW 19 | SW 18 | SE 11 | SSW 18 | SSW 17 | NNW 9 | S 19 | W 13 | W 12 | W 12 | W 11 |
19 | 35 | 23 | 16 | 79 | 15 | 30 | 25 | 25 | 11 | 14 | 13 | 5 | 30 | 29 | 7 | 64 | 30 | 25 | 25 | 22 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | E 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | ENE 11 |
210 | 176 | 164 | 181 | 156 | 156 | 155 | 153 | 302 | 200 | 260 | 362 | 371 | 375 | 547 | 588 | 831 | 940 | 1156 | 1198 | 1146 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 31 | 1 | 31 | 31 | 1 | 31 | 39 | 31 | 31 | 126 | 44 | 39 | 126 | 31 | 165 | 201 | 113 | 152 | 126 | 19 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Number Fours Surf forecast
The above surf forecast table for Number Fours provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Number Fours can be found by selecting the local surf guide option on the grey menu. Our Number Fours 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 Fours) 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 Fours 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 Fours 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.











