
Surf Forecasts:
In Betweens surf forecast from 4 Sep 2026:
- Best quality surf: Sunday 6 Sep, 8PM (local time) - 7.5ft (2.3m), 12s period, ENE swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 8PM (local time) - 15ft (4.5m), 14s period, SSW swell with 8,639 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 8PM (local time) - 7.5ft (2.3m), 12s period with ENE swell.
Best Forecast Surf Conditions for In Betweens this week:
The surf forecast for In Betweens over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 06) at 8PM. The primary swell is predicted to be 2.3m and 12s period with a secondary swell of 1.8m and 14s. Another secondary swell of 0.5m and 19s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at In Betweens in the next 16 days are 4.5m 14s and forecast to arrive on Monday (Sep 07) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 10s period and expected on Tuesday (Sep 08) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sun 6th Sep) | 7.5ft (2.3m) 12s |
| Best Surf | 8PM (Sun 6th Sep) | 7.5ft (2.3m) 12s |
| Most Powerful | 8PM (Mon 7th Sep) | 15ft (4.5m) 14s |
Table - best surf conditions forecast for In Betweens over the next 16 days.
The Lowdown
Alright, this is Rusty. Let’s take a look at what’s coming up for In-Betweens over the next couple of weeks.
Honestly, the outlook is a tough one to get excited about. We’ve got a long stretch of marginal to poor surf with a cross-off breeze that keeps the surface clean, but the waves themselves just aren’t cooperating for paddle surfing. The whole first week and a half is a bit of a battle.
Things start off Thursday afternoon, September 3rd, with a messy 8ft ENE swell but it’s short-period at 7 seconds, combined energy is moderate at 1090, and that ENE wind is pumping at 25 mph. The water temp is 81°, which is about average for this time of year. It’s just not worth suiting up for.
Friday the 4th sees the swell drop to 4ft but shifts south with a nice long 13-second period, and combined energy builds to 1335. The wind is still a fresh 22 mph cross-off, so the surface is clean, but the model flags it as marginal. Friday afternoon is similar at 5ft, 12 seconds, and even more energy at 1602, but again, it’s not clicking.
Saturday the 5th is the most interesting window early on. Morning and afternoon both show a clean 7ft swell from the ENE, 13-second period, and combined energy jumps way up to 2305. That’s a solid moderate-to-strong energy reading. The wind is a more manageable 19 mph cross-off. Still, the forecast score is only a 2, so while the ingredients are there, the quality just isn’t there. It might be worth a look for a dedicated surfer, but I wouldn’t call it a standout.
Sunday the 6th holds similar size at 7ft to 7ft, but the wind drops a bit to 12-16 mph. The combined energy peaks at 2485 on Sunday afternoon, the best energy reading of the early period. Still, it’s a marginal call.
Then Monday the 7th rolls in with the biggest pulse. Monday morning sees a 8ft SSW groundswell with a very long 15-second period, and combined energy absolutely spikes to 5381. That is strong energy. But here’s the catch: the wind swings ESE at 16 mph, creating a cross-shore chop. By Monday afternoon, the swell jumps to 13ft with the same long period and energy at 8984, but the wind is onshore from the SE at 22 mph, making it lumpy and poor. That setup is way too big for beginners at 13ft, and with that onshore wind, this is more of a kite-surfing day than paddle surfing.
After that, the second week is a washout for quality. From Tuesday the 8th onward, we see a mix of small swells from 2ft to 8ft, mostly ENE, but the period is short (8 seconds) and the wind stays a fresh to strong cross-off at 19-25 mph. The combined energy readings are mostly in the 360 to 1600 range—moderate at best. There’s a little blip on September 15th with a 7ft ENE swell and 10-second period giving 1614 energy, but the forecast score is still low. Nothing here is going to get your heart racing.
The only real standout is Saturday the 5th and Sunday the 6th, with that cleaner 7ft swell and dropping wind. It’s not perfect, but it’s the closest thing to a window we’ve got. The rest of the 16 days is a long, frustrating gap with no solid recommendations. For an exposed reef break like In-Betweens, that’s just how it goes sometimes. Crowds are listed as “sometimes” here, so you might not have to fight for a wave, but honestly, you’re not missing much right now.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun morning. Warm (max 26°C on Thu afternoon, min 25°C on Thu afternoon). Mainly strong winds. | Days 5-7 Weather SummaryHeavy rain (total 33mm), heaviest during Sun night. Warm (max 28°C on Tue afternoon, min 23°C on Sun night). Winds decreasing (strong winds from the SSE on Mon night, light winds from the SE by Tue night). | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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 7 | S 13 | E 14 | E 14 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | SSW 14 | SSW 15 | SSW 15 | SW 11 | ENE 11 | ENE 10 | SSW 14 | SSW 14 | E 13 | E 13 |
Wave Graph | ||||||||||||||||||||
558 | 487 | 529 | 594 | 1807 | 1641 | 1641 | 1568 | 1240 | 1369 | 1700 | 3195 | 6963 | 2891 | 550 | 371 | 356 | 273 | 229 | 219 | |
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 | cross-on | on | on | on | cross | cross-off | cross-off | cross-off |
High Tide | 7:57PM0.22m | 10:58AM0.66m | 10:35PM0.19m | 12:05PM0.69m | 00:18AM0.21m | 1:00PM0.73m | 1:21AM0.26m | 1:47PM0.73m | 2:09AM0.32m | 2:28PM0.72m | 2:51AM0.39m | 3:05PM0.69m | 3:32AM0.45m | |||||||
Low Tide | 6:22PM0.22m | 2:24AM0.08m | 7:30PM0.17m | 3:46AM0.09m | 8:03PM0.13m | 5:11AM0.08m | 8:31PM0.10m | 6:25AM0.07m | 8:57PM0.08m | 7:26AM0.06m | 9:22PM0.06m | 8:21AM0.06m | 9:46PM0.05m | |||||||
— | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | |
6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | |
mm | — | — | — | — | — | — | — | — | 1 | 8 | 14 | — | — | 7 | 2 | 1 | 1 | — | — | — |
Temp °C | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 27 | 26 |
Feels °C | 22 | 21 | 22 | 22 | 22 | 24 | 23 | 24 | 25 | 26 | 25 | 27 | 26 | 25 | 28 | 31 | 31 | 27 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | SSE 12 | S 13 | S 13 | S 12 | S 12 | S 12 | S 12 | SSW 12 | SSW 12 | SSW 12 | SSW 14 | SSW 15 | SSW 15 | ENE 12 | SSW 9 | ENE 10 | ENE 8 | ENE 8 | ENE 8 | E 13 |
187 | 339 | 529 | 594 | 469 | 547 | 661 | 718 | 656 | 608 | 1700 | 3195 | 6963 | 1001 | 482 | 290 | 177 | 142 | 128 | 219 | |
Swell 2 Height (m) Direction Period (s) | S 14 | E 14 | E 14 | E 14 | N 11 | SSW 17 | NNE 10 | N 8 | SSW 16 | SSW 15 | S 18 | SSW 17 | ENE 12 | SSW 15 | ENE 11 | SSW 8 | S 8 | SSW 14 | E 13 | SSW 13 |
200 | 334 | 357 | 577 | 10 | 117 | 19 | 12 | 310 | 474 | 240 | 394 | 1556 | 474 | 550 | 240 | 134 | 273 | 229 | 133 | |
Swell 3 Height (m) Direction Period (s) | E 12 | SW 18 | SW 12 | SW 13 | SSW 20 | NNE 10 | S 22 | N 11 | SSE 10 | SSE 10 | N 9 | S 8 | SSW 17 | E 14 | W 9 | SSW 14 | SSW 14 | E 13 | SSW 13 | S 7 |
145 | 12 | 6 | 27 | 37 | 20 | 9 | 9 | 19 | 34 | 2 | 116 | 465 | 148 | 194 | 371 | 356 | 229 | 204 | 28 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 14 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | ENE 12 | — | SW 11 | — | — | — | — | — | ENE 7 |
558 | 487 | 443 | 404 | 1807 | 1641 | 1641 | 1568 | 1240 | 1369 | 1649 | 1676 | — | 2891 | — | — | — | — | — | 167 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 44 | 39 | 44 | 126 | 30 | 30 | 38 | 30 | 30 | 1 | 1 | 58 | 124 | 142 | 20 | 16 | 1 | 3 | 31 | 30 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the In Betweens Surf forecast
The above surf forecast table for In Betweens provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at In Betweens can be found by selecting the local surf guide option on the grey menu. Our In Betweens 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 (In Betweens) 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 In Betweens 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.
In Betweens is 4 km (2 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.










