
Surf Forecasts:
Number Fours surf forecast from 2 Aug 2026:
- Best quality surf: Tuesday 4 Aug, 5AM (local time) - 5ft (1.5m), 11s period, ENE swell with cross-offshore winds.
- Most powerful swell: Sunday 2 Aug, 11AM (local time) - 7ft (2.2m), 8s period, ENE swell with 699 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 5AM (local time) - 5ft (1.5m), 11s period with ENE swell.
Best Forecast Surf Conditions for Number Fours this week:
The surf forecast for Number Fours over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 04) at 5AM. The primary swell is predicted to be 1.5m and 11s period with a secondary swell of 0.4m and 12s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Number Fours in the next 16 days are 2.2m 8s and forecast to arrive on Sunday (Aug 02) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Thursday (Aug 06) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 4th Aug) | 5ft (1.5m) 11s |
| Best Surf | 5AM (Tue 4th Aug) | 5ft (1.5m) 11s |
| Most Powerful | 11AM (Sun 2nd Aug) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s take a look at what’s coming up for Number Fours over the next couple of weeks. Honestly, it’s a bit of a frustrating outlook for us. The whole 16-day window is a struggle, with no real standout sessions. The first few days are the least bad, but even then, it’s not exactly firing.
Right off the bat, from Sunday the 2nd of August, we’ve got some swell on the cards, but it’s a tricky one. The water temp is sitting at 81°, which is about normal for this time of year, so nothing weird there. The morning brings a 7ft swell from the east-northeast, but with a short, weak period of only 8 seconds. The wind is a fresh 22 mph from the east-northeast, making it cross-off. The combined energy is high (1061), but the short period and wind mean the wave quality is poor. It’s really just a messy, choppy situation. The afternoon is worse, with the same swell but a “poor surf conditions” tag.
Monday the 3rd is a bit smaller, with a 5ft, 8-second swell in the morning, and the wind eases to 16 mph. Still cross-off, still marginal. The energy drops to 523. It’s not good, but it’s the most rideable of the first few days. The afternoon sees dropping swell and strengthening wind again.
Tuesday the 4th is the best of the whole run, and it’s sad to say that. The morning has a 5ft swell from the east-northeast, but the period finally stretches out to 11 seconds. That longer period means better shape and more energy. The wind is a gentle 9 mph cross-off, which is as good as it gets. The combined energy is 566. It’s still marginal, but with that longer period and lighter wind, it’s the cleanest window we’ve got. The afternoon is similar, just slightly smaller.
From Wednesday the 5th onwards, it’s a slow decline. Swell drops below 4ft, the period gets shorter, and the wind stays up. The energy levels fall into the low hundreds. By Thursday the 6th, the morning has a 3ft, 8-second swell with 9 mph wind, but it’s barely a ripple. The afternoon brings a fresh 19 mph breeze, making it ugly.
Things get weird from Friday the 7th. We get a tiny 1ft, 14-second groundswell from the south-southwest in the morning, but it’s so small and the wind is up. The energy is only 120. That’s a weak, long-period swell that’s better suited to a point or reef, but the size is pathetic. Saturday the 8th sees a jump back to 6ft, but it’s a short-period 7-second wind swell with a strong 22-25 mph breeze. That’s just a washing machine.
The second week, from the 9th of August onward, is a write-off. The swell hangs around 3ft to 4ft, mostly from the south, with periods between 14 and 20 seconds. That’s good groundswell potential, but the energy is moderate (around 700-900) and the wind is relentless, 19-22 mph from the east-northeast every day. It’s cross-off and strong, so the surface will be a mess. The 17th of August brings a return to a 5ft, 8-second east-northeast swell, but with the same fresh wind, it’s another no-go.
The standout here is Tuesday the 4th of August, morning session. That 5ft, 11-second swell from the east-northeast with the gentle 9 mph cross-off is the only window where the surf will be clean and have some push. The rest of the run is either too small, too windy, or too short-period. For a reef break that’s fairly consistent and exposed, this is a poor run. Crowds are possible on that Tuesday, but given the marginal quality, it might be quiet.
If you’re desperate, save your energy for that Tuesday morning. Everything else is a hard pass. Keep an eye on the forecast, but for now, it’s a long wait.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sun morning, min 24°C on Sun night). Winds decreasing (fresh winds from the ENE on Sun afternoon, light winds from the ENE by Tue morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Wed afternoon, min 25°C on Wed morning). Winds increasing (light winds from the ENE on Wed night, fresh winds from the ENE by Fri night). | ||||||||||||||||||||
Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | |||||||||||||||
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 | ENE 8 | ENE 8 | ENE 8 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | SSW 14 | SW 14 | SW 21 | SW 20 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
699 | 627 | 560 | 353 | 284 | 593 | 452 | 379 | 358 | 258 | 158 | 147 | 128 | 80 | 102 | 115 | 99 | 181 | 285 | 251 | 348 | |
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 | cross-off |
High Tide | 6:24PM0.52m | 7:47AM0.42m | 6:55PM0.44m | 8:56AM0.47m | 7:27PM0.36m | 10:11AM0.53m | 8:07PM0.29m | 11:24AM0.60m | 9:30PM0.22m | 12:27PM0.67m | 11:32PM0.19m | 1:22PM0.73m | 00:59AM0.19m | ||||||||
Low Tide | 12:06PM0.16m | 1:15AM0.04m | 1:14PM0.22m | 1:46AM0.04m | 2:52PM0.27m | 2:23AM0.03m | 5:19PM0.27m | 3:10AM0.03m | 7:39PM0.21m | 4:08AM0.02m | 8:34PM0.16m | 5:14AM0.01m | 9:09PM0.12m | ||||||||
6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | |
— | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:06 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 26 | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 23 | 23 | 22 | 25 | 24 | 24 | 27 | 27 | 28 | 27 | 27 | 27 | 26 | 26 | 25 | 24 | 23 | 24 | 23 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | E 14 | E 14 | E 13 | E 13 | E 12 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 |
246 | 192 | 125 | 84 | 108 | 593 | 452 | 379 | 358 | 258 | 158 | 147 | 128 | 43 | 22 | 77 | 73 | 108 | 115 | 102 | 99 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 13 | SW 12 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 15 | SW 14 | SSW 14 | SSW 14 | SW 14 | SSE 11 | SSE 11 | SSW 19 | SW 18 | SSW 18 | SW 18 |
133 | 67 | 40 | 53 | 50 | 56 | 46 | 51 | 47 | 47 | 88 | 54 | 82 | 80 | 102 | 22 | 38 | 148 | 164 | 124 | 150 | |
Swell 3 Height (m) Direction Period (s) | N 9 | N 9 | SSW 13 | SW 13 | SW 13 | SSE 9 | W 13 | SW 16 | SW 15 | SSE 13 | SSW 11 | SSE 12 | SSE 12 | SSE 11 | SSE 11 | SW 21 | SW 20 | SSE 11 | S 10 | SSE 10 | SSE 10 |
15 | 14 | 58 | 42 | 41 | 17 | 30 | 68 | 57 | 56 | 38 | 48 | 26 | 41 | 40 | 115 | 99 | 22 | 17 | 18 | 19 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | — | — | — | — | — | — | — | ENE 6 | ENE 6 | ENE 5 | ENE 5 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
699 | 627 | 560 | 353 | 284 | — | — | — | — | — | — | — | — | 36 | 57 | 51 | 71 | 181 | 285 | 251 | 348 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 128 | 44 | 34 | 2 | 34 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 31 | 31 | 31 | 31 | 39 | 39 | 39 | 39 | 31 |
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.











