Surf Forecasts:
Number Fours surf forecast from 7 Jul 2026:
- Most powerful swell: Wednesday 8 Jul, 11PM (local time) - 8ft (2.5m), 8s period, ENE swell with 768 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 2.5m 8s and forecast to arrive on Wednesday (Jul 08) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 8s period and expected on Sunday (Jul 12) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Wed 8th Jul) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
Updates in hr min s Forecast update imminent
Alright folks, Rusty here. Let’s be straight – the next 16 days at Number Fours are a tough watch. There’s no good surf on the cards right now, and the whole window looks pretty flat or messy. The reef here usually fires when we get a decent SSE swell and a nor’ly offshore, but the forecast is all about ENE wind and swell – cross-off all day, every day. That’s just not gonna line up.
The first week is the worst. From Monday July 6 right through to Saturday July 11, it’s constant ENE wind around 18–25 mph, bumpy 6–7 ft swell with a short period of 7 seconds, and the wave energy is weak to moderate – you’re looking at values like 888, 919, all under 1000. That’s not surfable, it’s just chop. Water temp is about 80°F, pretty average for this time of year, so that’s not the issue.
Then Sunday July 12 through to Tuesday July 14, it’s still mostly ENE, still cross-off, still poor. A few marginal windows pop up around Wednesday July 15, but even then the swell drops and the wind doesn’t ease. Nothing to get excited about.
Now, there are two tiny glimpses of hope, but they’re as much a tease as a real opportunity. On Friday July 17, late afternoon, we finally see a change – light ENE wind around 9 mph, and a little pulse of SSW groundswell. Only 2 ft, but with a period of 16 seconds, so it’s clean, glassy, and long period. That could be fun for a log or a longboard, but it’s tiny. Then on Monday July 20, early morning, an even smaller E groundswell – 2 ft at 19 seconds – again with light wind. Energy readings are higher (650, 694) because of that long period, but the wave height is barely knee-high. For a reef like Number Fours, such long-period swell can break straight on the beach, but here it’s a reef, so maybe a few corners. Still, not worth making a trip.
Bottom line: if you’re desperate, keep an eye on July 17 and July 20 for a quick paddle on a longboard, but otherwise save your energy. This place is fair, and it’ll come back – just not in this forecast window.
Rusty
Short Range ForecastMostly dry. Warm (max 25°C on Mon afternoon, min 24°C on Mon night). Mainly strong winds. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Fri night. Warm (max 25°C on Thu afternoon, min 24°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Mon 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | SW 16 | ENE 8 | ENE 7 | ENE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 478 | 531 | 629 | 471 | 542 | 400 | 526 | 468 | 440 | 319 | 344 | 482 | 456 | 444 | 405 | 369 | 352 | 376 | 441 | 468 | 469 |
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 | 8:17PM0.41m | 10:50AM0.43m | 9:01PM0.34m | 11:51AM0.52m | 10:00PM0.26m | 12:45PM0.61m | 11:18PM0.20m | 1:36PM0.69m | 00:40AM0.17m | 2:24PM0.76m | 1:50AM0.16m | 3:11PM0.80m | 2:52AM0.17m | ||||||||
Low Tide | 2:35PM0.23m | 3:29AM-0.00m | 4:35PM0.25m | 4:06AM-0.02m | 6:43PM0.23m | 4:48AM-0.04m | 8:17PM0.17m | 5:36AM-0.06m | 9:18PM0.12m | 6:28AM-0.08m | 10:04PM0.07m | 7:21AM-0.09m | 10:45PM0.04m | 8:13AM-0.09m | |||||||
 |  |  | |  | | | | | | | | |  | | | |  | | | | |
 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 |
 | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | 7:15 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 1 | 1 | — | — | — |
Temp °C | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 21 | 20 | 21 | 21 | 20 | 21 | 21 | 20 | 22 | 22 | 21 | 23 | 22 | 23 | 22 | 23 | 24 | 24 | 23 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | S 13 | S 12 | S 12 | S 12 | S 12 | SSW 11 | SW 19 | SSW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 |
| kJ | 402 | 284 | 280 | 273 | 195 | 192 | 187 | 125 | 113 | 112 | 75 | 71 | 41 | 184 | 221 | 316 | 309 | 376 | 367 | 353 | 326 |
Swell 2 Height (m) Direction Period (s) | SSE 9 | SSE 8 | SSE 10 | SE 8 | SE 10 | SE 9 | SSE 8 | W 15 | S 16 | W 14 | W 13 | W 13 | W 14 | S 12 | S 12 | W 13 | W 13 | W 12 | SSE 12 | SSE 12 | SSE 12 |
| kJ | 8 | 7 | 10 | 3 | 4 | 3 | 6 | 17 | 21 | 15 | 13 | 13 | 37 | 41 | 43 | 54 | 54 | 27 | 47 | 28 | 27 |
Swell 3 Height (m) Direction Period (s) | W 10 | NW 9 | N 9 | S 10 | — | W 18 | S 18 | W 15 | W 14 | SE 8 | W 16 | SSW 21 | SW 21 | W 13 | W 14 | S 12 | S 11 | SSE 13 | W 12 | W 12 | W 16 |
| kJ | 2 | 3 | 2 | 2 | — | 6 | 6 | 4 | 4 | 2 | 20 | 45 | 109 | 55 | 63 | 44 | 39 | 16 | 26 | 26 | 45 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | NE 8 | ENE 8 | ENE 7 | ENE 8 |
| kJ | 478 | 531 | 629 | 471 | 542 | 400 | 526 | 468 | 440 | 319 | 344 | 482 | 456 | 444 | 405 | 369 | 352 | 388 | 441 | 468 | 469 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 127 | 39 | 42 | 126 | 39 | 39 | 44 | 39 | 39 | 44 | 32 | 34 | 46 | 31 | 33 | 39 | 31 | 31 | 39 | 31 | 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.
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