Surf Forecasts:
Number Fours surf forecast from 10 Jul 2026:
- Most powerful swell: Sunday 12 Jul, 2PM (local time) - 7ft (2.2m), 8s period, ENE swell with 545 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 2.2m 8s and forecast to arrive on Sunday (Jul 12) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 8s period and expected on Tuesday (Jul 14) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Sun 12th Jul) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
Right, let’s have a look at what’s on the cards for Number Fours. It's a reef break that's fairly consistent.
Honestly, if you're looking for a good session, you're going to be waiting a while. The next week and a half is pretty grim. We've got a solid, persistent ENE wind blowing straight across the swell, making it a cross-off mess. The swell is a bit of a weird one too – it's coming from the ENE, but Number Fours ideally wants it from the SSE. That mismatch, with a short, weak period of around 7-8 seconds, is just not going to produce anything worth paddling out for. The wave energy is moderate at best, hitting 544 (moderate) on Thursday the 9th and climbing to 909 (moderate) by Sunday the 12th, but none of that matters with the wind and direction being so wrong. It's just a washing machine. The water is sitting at a warm 79°F and is about normal for this time of year.
From Thursday the 9th right through to the end of the week starting the 20th, there's nothing you'd want to get out of bed for. The swell does get a bit bigger, with a couple of days pushing 7ft on Saturday the 11th, but that's only for experts, and with the short period and cross-off breeze, it's just going to be a messy, bumpy, and powerful close-out. Frankly, it looks more interesting for kite surfing than paddle surfing.
Then, around Monday the 20th, things start to look a little more promising. We get a bit of a shift. On Monday morning, a new, long-period groundswell from the South arrives at 3ft with a 16-second period, which jumps to 3ft from the East with a 16-second period on Tuesday the 21st. The wave energy is strong, hitting 711 (moderate) and then 1086 (strong) respectively. This is a proper groundswell. The catch? The wind is still a cross-off from the ENE, but it's lighter. For a reef break like Number Fours, a long-period swell like this can be really good. It'll have plenty of energy and shape, but it might be a bit tricky and straight for some. It's still a long way out, so treat this as a promising but less certain prospect. The best of the bunch looks like Tuesday the 21st morning, with that 3ft, 16-second E swell and moderate energy. If that wind cleans up, it could be a fun, punchy session, but expect crowds as it's a known spot.
Keep an eye on the forecasts, but for now, unless you're desperate, I'd give it a miss for the next ten days.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Thu afternoon, min 24°C on Thu night). Mainly strong winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Sun afternoon, min 24°C on Sun night). Mainly strong winds. | ||||||||||||||||||||
Thu 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | |||||||||||||||
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 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | SW 14 | ENE 8 | ENE 7 | ENE 7 | SSW 18 | SSW 16 | ENE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 428 | 426 | 353 | 310 | 392 | 459 | 420 | 309 | 449 | 514 | 487 | 383 | 336 | 280 | 191 | 264 | 250 | 178 | 237 | 314 | 222 |
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 | 11:18PM0.20m | 1:36PM0.69m | 00:40AM0.17m | 2:24PM0.76m | 1:50AM0.16m | 3:11PM0.80m | 2:52AM0.17m | 3:56PM0.82m | 3:49AM0.19m | 4:39PM0.80m | 4:45AM0.22m | 5:20PM0.76m | 5:41AM0.26m | ||||||||
Low Tide | 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 | 11:23PM0.02m | 9:06AM-0.08m | 11:59PM0.01m | 9:57AM-0.04m | 00:34AM0.01m | 10:49AM0.01m | |||||||
 |  | | | |  | | | | | | | | | | | | | | | | |
 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 |
 | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | 7:15 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 22 | 20 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 21 | 21 | 22 | 22 | 21 | 22 | 22 | 23 | 23 | 22 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 12 | S 12 | SSW 11 | SW 19 | SSW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 | SSW 15 | SW 14 | SW 14 | SW 14 | W 15 | W 15 | W 15 | SSW 16 | W 14 |
| kJ | 110 | 75 | 71 | 42 | 184 | 221 | 316 | 309 | 376 | 367 | 353 | 326 | 272 | 208 | 191 | 186 | 227 | 221 | 215 | 314 | 203 |
Swell 2 Height (m) Direction Period (s) | W 14 | W 13 | W 13 | SW 21 | S 12 | W 14 | W 13 | W 13 | S 13 | SSE 12 | W 12 | SSE 12 | W 18 | W 18 | W 16 | W 16 | SSW 13 | SW 13 | SW 14 | W 15 | SSW 16 |
| kJ | 15 | 13 | 13 | 109 | 42 | 63 | 54 | 54 | 29 | 28 | 26 | 27 | 97 | 152 | 190 | 188 | 113 | 164 | 203 | 212 | 175 |
Swell 3 Height (m) Direction Period (s) | SSE 8 | W 16 | SSW 21 | W 13 | W 13 | S 12 | S 12 | S 11 | W 12 | W 12 | SSE 12 | W 12 | SSE 11 | SW 18 | SSW 19 | SW 19 | SSW 17 | SW 18 | SSW 18 | SSE 9 | SSW 13 |
| kJ | 6 | 20 | 45 | 29 | 55 | 44 | 25 | 22 | 27 | 26 | 28 | 26 | 25 | 82 | 146 | 94 | 197 | 152 | 209 | 8 | 113 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | NE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
| kJ | 428 | 426 | 353 | 310 | 392 | 459 | 420 | 307 | 449 | 514 | 487 | 383 | 336 | 280 | 236 | 264 | 250 | 178 | 237 | 270 | 222 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 44 | 48 | 31 | 42 | 31 | 39 | 42 | 31 | 39 | 42 | 31 | 31 | 32 | 31 | 31 | 31 | 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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