Surf Forecasts:
Number Fours surf forecast from 6 Jul 2026:
- Most powerful swell: Monday 6 Jul, 2PM (local time) - 7.5ft (2.3m), 8s period, ENE swell with 575 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 2.3m 8s and forecast to arrive on Monday (Jul 06) 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 1.9m 8s period and expected on Sunday (Jul 12) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Mon 6th Jul) | 7.5ft (2.3m) 8s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
Updates in hr min s Forecast update imminent
Hey folks, Rusty here. Let's break down what Number Fours is looking like.
Honestly, it’s a rough start. From Monday the 6th of July right through until about Tuesday the 14th of July, we’ve got a relentless cross-offshore wind screaming out of the ENE at 25 to 25 mph. That wind is just ruining the surface, even though there is some swell in the water. The wave energy is moderate, but it’s all short-period windswell at 7 to 8 seconds, so the waves are weak and messy. Water temp is about normal for this time of year.
On Sunday the 12th of July, the swell direction shifts to the SW at about 3ft, but the period cranks up to 16 seconds – that’s a proper long-period groundswell. Problem is, the wind is still howling cross-off at 22 mph, so it’ll be a choppy mess. That groundswell needs glass to shine at a reef.
The only real standout, and the best chance you’ve got, comes on Tuesday the 21st of July. The wind finally backs off to a moderate 15 mph from the ENE, still cross-off but way cleaner. The swell holds at around 6ft from the ENE with a short 7-second period, and the energy is moderate. The scores here are the best of the whole run. It’s still a windswell, but with lighter breeze, the reef will be cleaner. For anyone comfortable on a solid 6ft wave at a reef, that’s your day. Just remember, crowds are sometimes a factor, so expect some company.
Before that, from the 14th to the 20th of July, it’s more of the same: marginal to poor conditions with a few tiny pulses of long-period groundswell that are just too small and wind affected to get excited about.
So, the bottom line: a long wait for a clean window. Mark Tuesday the 21st of July on the calendar. That’s the one.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sun night, min 24°C on Sun night). Mainly strong winds. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Fri night. Warm (max 26°C on Fri afternoon, min 24°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||
Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sun 12 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SSW 16 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | SW 16 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 457 | 462 | 508 | 469 | 545 | 447 | 542 | 389 | 379 | 376 | 390 | 242 | 325 | 362 | 397 | 531 | 379 | 343 | 352 | 376 | 367 |
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 | 9:42AM0.35m | 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 | ||||||||
Low Tide | 2:56AM0.01m | 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 | ||||||||
 |  | | | | | | | | | | |  |  | |  |  | | | | | |
 | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — |
 | 7:16 | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — |
Temp °C | 25 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 24 | 25 | 25 |
Feels °C | 22 | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 21 | 24 | 24 | 24 | 23 | 23 | 22 | 21 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | 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 |
| kJ | 457 | 337 | 402 | 284 | 280 | 273 | 195 | 192 | 187 | 125 | 113 | 112 | 75 | 71 | 41 | 184 | 221 | 316 | 309 | 376 | 367 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSE 9 | SSE 9 | SSE 8 | NW 9 | SE 8 | SE 9 | SE 8 | SSE 8 | W 15 | SSE 7 | W 14 | W 13 | W 13 | SW 21 | S 12 | W 14 | SSE 12 | W 13 | W 12 | SSE 12 |
| kJ | 34 | 8 | 8 | 7 | 3 | 3 | 3 | 3 | 7 | 17 | 11 | 15 | 13 | 13 | 110 | 42 | 63 | 46 | 55 | 28 | 47 |
Swell 3 Height (m) Direction Period (s) | SSE 10 | SSW 13 | W 10 | NW 9 | SE 10 | S 10 | — | W 18 | S 18 | SE 8 | S 16 | SSE 6 | SSE 5 | SSW 21 | W 13 | W 13 | S 12 | W 13 | S 11 | SSE 13 | W 12 |
| kJ | 9 | 17 | 2 | 3 | 4 | 2 | — | 6 | 6 | 3 | 21 | 3 | 3 | 45 | 29 | 55 | 44 | 54 | 39 | 32 | 27 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | NE 8 | NE 8 |
| kJ | 373 | 462 | 508 | 469 | 545 | 447 | 542 | 389 | 379 | 376 | 390 | 242 | 325 | 362 | 397 | 531 | 379 | 343 | 352 | 398 | 398 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 42 | 126 | 127 | 32 | 126 | 126 | 39 | 39 | 42 | 39 | 39 | 39 | 31 | 31 | 39 | 31 | 44 | 48 | 31 | 39 | 39 |
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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