Surf Forecasts:
Nai Harn Beach surf forecast from 4 Jul 2026:
- Best quality surf: Thursday 9 Jul, 10PM (local time) - 3.5ft (1.0m), 7s period, W swell with glassy winds.
- Most powerful swell: Sunday 12 Jul, 1AM (local time) - 4.5ft (1.4m), 7s period, W swell with 210 kJ wave energy.
- Next surfable swell (1★+): Thursday 9 Jul, 10PM (local time) - 3.5ft (1.0m), 7s period with W swell.
Best Forecast Surf Conditions for Nai Harn Beach this week:
The surf forecast for Nai Harn Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jul 09) at 10PM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.1m and 15s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Nai Harn Beach in the next 16 days are 1.4m 7s and forecast to arrive on Sunday (Jul 12) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Sunday (Jul 05) at 1AM.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 9th Jul) | 3.5ft (1.0m) 7s |
| Best Surf | 10PM (Thu 9th Jul) | 3.5ft (1.0m) 7s |
| Most Powerful | 1AM (Sun 12th Jul) | 4.5ft (1.4m) 7s |
Table - best surf conditions forecast for Nai Harn Beach over the next 16 days.
Updates in hr min s Forecast update imminent
Right then, let’s have a look at what Nai Harn Beach has in store for us over the next couple of weeks. I’ve gotta be straight with you – this is a tough run of forecasts. We’ve got a solid 16-day window here, but it’s a long, dry spell for any decent surf. The whole period is basically a write-off for paddle surfing, I’m sorry to say.
Looking at the pattern, it kicks off on Saturday the 4th of July with a cross-onshore wind already messing things up. The combined swell energy is moderate at 186, but with that wind, the surf is poor and choppy. That sets the tone, I’m afraid. From there, we go straight into a gap with no real surf on offer. The swell does try to pick up a little around the 8th of July, with wave heights hitting 5ft from the west and moderate energy levels (220), but the wind is always cross-onshore or onshore, blowing between 9 and 22 mph, keeping it messy. There’s a couple of mornings with onshore wind, but it's still a cross-onshore breeze, so it never cleans up. The water temp is around 86°F, which is pretty normal for this time of year, so that’s about the only thing that’s comfortable.
Even when the swell pushes above 7ft on the 13th of July – that’s a Monday morning with the combined energy climbing to 549 – the wind is still a problem, and the forecast is for risk of thunderstorms. That’s just not a fun paddle. For any of these days with swell over 5ft, it’s already too much for a beginner, and with the wind all wrong, it’s not worth the effort for anyone else. With the constant cross-onshore wind and a beach-and-reef setup, this honestly looks more interesting for kite surfing than for paddle surfing.
We then see the swell drop right off a cliff from the 16th of July onward, with tiny waves of 0.3ft to 0.7ft, and the combined energy falling to single digits. That’s it. The whole 16-day outlook is a bust. There are no standouts, no good options, just a long stretch of poor, unrideable conditions. It’s a blank run, but for this area, with its inconsistent nature, it’s not totally unusual. Forecasts can change, but right now, I’d say hang the board up for a bit.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Mon night. Warm (max 29°C on Sat afternoon, min 28°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Wed morning. Warm (max 29°C on Tue afternoon, min 28°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Sat 4 | Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | |||||||||||||||
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) | W 7 | WSW 16 | W 8 | WSW 15 | W 19 | WSW 18 | W 9 | W 9 | W 9 | W 6 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 162 | 24 | 63 | 21 | 7 | 30 | 132 | 39 | 56 | 120 | 127 | 199 | 184 | 113 | 120 | 123 | 85 | 86 | 104 | 65 | 172 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | glassy | cross-on | cross-on | cross-on | cross-on |
High Tide | 1:28AM1.55m | 1:30PM1.76m | 2:09AM1.55m | 2:09PM1.67m | 2:56AM1.54m | 2:55PM1.56m | 3:51AM1.54m | 3:53PM1.44m | 4:58AM1.54m | 5:09PM1.34m | 6:14AM1.59m | 6:39PM1.31m | 7:28AM1.68m | ||||||||
Low Tide | 7:22PM0.22m | 7:18AM0.41m | 7:57PM0.24m | 8:02AM0.47m | 8:36PM0.28m | 8:53AM0.54m | 9:22PM0.33m | 9:57AM0.60m | 10:18PM0.40m | 11:17AM0.62m | 11:27PM0.45m | 12:46PM0.57m | 00:45AM0.46m | ||||||||
 |  | | |  | |  |  |  | | | | | |  | |  | | | | | |
 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 |
 | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | 6:47 |
mm | — | 2 | — | — | — | — | — | 4 | 1 | — | — | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 |
Feels °C | 30 | 31 | 30 | 31 | 32 | 31 | 30 | 32 | 30 | 29 | 28 | 30 | 29 | 29 | 31 | 30 | 32 | 31 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | W 7 | W 8 | W 8 | W 8 | W 9 | W 9 | WNW 9 | W 9 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 |
| kJ | 24 | 127 | 149 | 161 | 140 | 146 | 132 | 106 | 56 | 25 | 24 | 21 | 21 | 113 | 120 | 123 | 85 | 86 | 104 | 65 | 172 |
Swell 2 Height (m) Direction Period (s) | — | WSW 16 | WSW 15 | WSW 15 | W 15 | WSW 18 | WNW 8 | W 9 | WNW 8 | NW 10 | W 8 | — | — | WSW 15 | WNW 8 | W 15 | W 18 | WNW 8 | SW 16 | WSW 16 | WSW 15 |
| kJ | — | 24 | 22 | 21 | 4 | 30 | 13 | 39 | 14 | 4 | 5 | — | — | 21 | 14 | 4 | 6 | 7 | 11 | 25 | 21 |
Swell 3 Height (m) Direction Period (s) | — | — | W 20 | W 19 | W 19 | W 14 | WSW 18 | WSW 17 | WSW 16 | — | — | — | — | — | WSW 15 | W 19 | W 14 | W 18 | W 13 | W 13 | — |
| kJ | — | — | 7 | 7 | 7 | 4 | 30 | 28 | 25 | — | — | — | — | — | 21 | 7 | 4 | 6 | 3 | 3 | — |
Wind waves Height (m) Direction Period (s) | W 7 | — | W 8 | — | — | — | — | — | W 5 | W 6 | W 7 | W 7 | W 7 | W 7 | — | — | — | — | — | — | W 7 |
| kJ | 162 | — | 63 | — | — | — | — | — | 32 | 120 | 127 | 199 | 184 | 48 | — | — | — | — | — | — | 68 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 24 | 4 | 4 | 24 | 4 | 4 | 24 | 4 | 4 | 635 | 24 | 4 | 4 | 0 | 4 | 4 | 4 | 635 |
Best forecast wave conditions in Phuket | |||||||||||||||||||||
Best forecast wave conditions in Thailand | |||||||||||||||||||||
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Information about the Nai Harn Beach Surf forecast
The above surf forecast table for Nai Harn Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nai Harn Beach can be found by selecting the local surf guide option on the grey menu. Our Nai Harn Beach 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 (Nai Harn Beach) 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 Nai Harn Beach 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.
Nai Harn Beach is 8 km (5 miles) from the city of Ban Chalong. If you plan a holiday in Phuket, look for hotels and other accommodation in Ban Chalong. Ban Chalong has rooms for a wide range of budgets as well as car hire and transport links.
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