
Surf Forecasts:
Number Fours surf forecast from 8 Jul 2026:
- Most powerful swell: Wednesday 8 Jul, 11PM (local time) - 8ft (2.4m), 8s period, ENE swell with 623 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 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 0.9m 7s period and expected on Wednesday (Jul 15) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Wed 8th Jul) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
Alright, let’s talk about Number Fours. It’s a pretty frustrating stretch ahead for us here. We’ve got a reef break that’s fairly consistent, but the wind and swell combo is just not doing us any favours for a good long while.
The water temp is sitting at 80°, which is pretty normal for this time of year, about what you’d expect.
Right from Wednesday the 8th, it’s a write-off. We’ve got a 7ft swell coming out of the ENE, but it’s short period at 7 seconds, and that persistent 25 mph cross-off wind just chops it all up. It’s all clean-looking on the surface, but the energy is all wrong. That same story runs all the way through the first week and into the second. There’s swell in the water, mostly between 5ft and 8ft, but the period never gets above 8 seconds. That’s a messy, short-period windswell that the reef just won’t groom into anything decent. The combined wave energy is moderate, hitting between 446 and 858 on the scale, but it’s junk energy.
We’ve got a solid 8 or 9 day gap here where there’s barely a sniff of a worthwhile wave. Everything is either “poor surf conditions” or “marginal.” You can see the frustration in the numbers.
Now, right at the tail end of the forecast, things get interesting. On Monday the 20th, the swell direction swings around to the S with a very long 15-second period. The height drops to 4ft, but the energy jumps to 878. That’s a groundswell, and for a reef like Number Fours that likes it from the SSE, that’s a promising sign despite the cross-off wind. But the real standout is Tuesday the 21st and Wednesday the 22nd. The swell drops to 3ft, but it’s coming from the E with an 18-second period, and the combined energy hits a massive 1185 to 1266. That is very strong wave energy for such a small height. We’re talking a proper, very long period groundswell wrapping in. The wind stays cross-off, which is not ideal for a reef, but with that period, if the direction lines up, those waves will have serious shape and push. It’s a two-day window that looks promising, but it’s a long way out, so don’t lock it in just yet.
After that, by Thursday the 23rd, it starts to back off again.
So, if you’re a surfer, the first week and a half is a hard pass. The only true standouts on offer are the mornings of the 21st and 22nd of July at Number Fours. That E swell with a very long period and that massive energy rating is the one to keep an eye on.
Rusty
Short Range ForecastSome drizzle, heaviest during Fri night. Warm (max 25°C on Wed morning, min 24°C on Wed morning). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sat morning, min 24°C on Sat morning). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | |||||||||||||||
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 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | SW 16 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 7 |
Wave Graph | |||||||||||||||||||||
526 | 495 | 481 | 393 | 373 | 390 | 330 | 301 | 420 | 560 | 498 | 428 | 444 | 397 | 540 | 400 | 327 | 330 | 294 | 240 | 199 | |
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 | 11:51AM0.52m | 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 | 3:56PM0.82m | 3:49AM0.19m | 4:39PM0.80m | 4:45AM0.22m | |||||||
Low Tide | 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 | 11:23PM0.02m | 9:06AM-0.08m | 11:59PM0.01m | ||||||||
5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | |
— | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | |
mm | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 24 |
Feels °C | 21 | 21 | 21 | 22 | 21 | 21 | 23 | 23 | 23 | 22 | 22 | 21 | 22 | 22 | 23 | 22 | 23 | 22 | 22 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | 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 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | ENE 7 |
192 | 187 | 125 | 112 | 110 | 75 | 71 | 42 | 184 | 221 | 316 | 309 | 376 | 367 | 353 | 322 | 272 | 257 | 239 | 232 | 140 | |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 8 | SSE 8 | SSE 8 | W 14 | W 13 | W 13 | SW 21 | S 12 | W 14 | W 13 | W 13 | S 11 | SSE 12 | SSE 12 | SSE 12 | W 18 | W 18 | W 16 | W 16 | NNE 7 |
3 | 3 | 6 | 6 | 15 | 13 | 13 | 109 | 42 | 63 | 54 | 54 | 22 | 47 | 28 | 27 | 99 | 150 | 183 | 186 | 76 | |
Swell 3 Height (m) Direction Period (s) | W 18 | S 18 | W 15 | S 16 | SSE 8 | W 16 | SSW 21 | W 13 | W 13 | S 12 | S 12 | S 11 | W 12 | W 12 | W 12 | W 12 | SSE 11 | SW 18 | SSW 19 | SW 19 | W 15 |
6 | 6 | 17 | 21 | 6 | 20 | 45 | 29 | 55 | 44 | 44 | 39 | 27 | 26 | 26 | 26 | 25 | 82 | 146 | 94 | 221 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 8 | 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 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 7 |
526 | 495 | 481 | 393 | 373 | 390 | 330 | 301 | 420 | 560 | 498 | 428 | 444 | 397 | 540 | 400 | 327 | 330 | 294 | 240 | 199 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 42 | 126 | 39 | 39 | 39 | 31 | 32 | 46 | 39 | 42 | 39 | 31 | 32 | 39 | 31 | 31 | 126 | 1 | 31 | 33 | 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.










