Surf Forecasts:
Nai Harn Beach surf forecast from 7 Jul 2026:
- Most powerful swell: Monday 13 Jul, 4AM (local time) - 8ft (2.4m), 8s period, W swell with 783 kJ wave energy.
Best Forecast Surf Conditions for Nai Harn Beach this week:
The most powerful waves expected at Nai Harn Beach in the next 16 days are 2.4m 8s and forecast to arrive on Monday (Jul 13) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 7s period and expected on Friday (Jul 10) at 4AM.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4AM (Mon 13th Jul) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Nai Harn Beach over the next 16 days.
Alright, this is Rusty. Let me level with you: the next 16 days here at Nai Harn Beach (Phuket) are a tough sell. There's always some swell in the water, but the wind has got it absolutely sloppy and chopped up. It's a bummer because there’s a solid amount of energy moving through, but without a clean window, it’s going to be a frustrating paddle.
The first few days, starting Tuesday the 7th, we barely have a ripple. The swell is a tiny 2 ft from the west with a weak combined energy of only 97, and that cross-on wind is just ruining it. Not even worth suiting up. From Wednesday the 8th through the rest of the week, the swell builds, but the problem is the wind. It stays locked in from the west, solidly cross-on, at 15 to 22 mph. The water is warm, about 86°, which is pretty normal for this time of year, but you’ll be battling chop the whole time. Swells range from 4 ft to 6 ft, and the energy climbs into the moderate range (200-345), but it's all messy.
The standout period, and I say this with a heavy heart, is Sunday the 12th through Monday the 13th. The swell really ramps up here, hitting 7 ft on Sunday, with combined energy of 551 and 588. Monday morning sees a strong 7 ft swell with the highest energy of the whole run at 795. It’s the most power we’ll see. For the groms, that 7 ft is getting into expert-only territory. However, the wind is still a problem. On Monday the 13th, the WSW wind turns directly onshore for the morning (still 19 mph), making it a stormy mess, and a risk of thunderstorms is in the air.
From the second week, the pattern doesn't let up. The sea state stays poor. You’ll see solid 7 ft and 7 ft swells from the 20th through the 22nd, with wave energy going strong (421-659), but the wind just gets worse. It strengthens to 22-28 mph. This cross-on, and eventually strong cross-onshore, chop turns the beach and reef setup into a washing machine. With that much wind and size, this stretch honestly looks more interesting for kite surfing than paddle surfing.
The one shift we get is on Monday the 13th morning, when the wind goes onshore. It breaks the cross-on pattern, but it's still strong and messy. For a pure paddle surfer, there’s no day here that gets the green light for clean, quality waves. This is a stretch where you check the forecast every day hoping for a shift, because the ocean has plenty of energy, it just can't find its shape.
Stay patient,
Rusty
Short Range ForecastMostly dry. Warm (max 29°C on Tue afternoon, min 28°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 21mm), heaviest during Sun night. Warm (max 29°C on Fri afternoon, min 28°C on Fri night). Mainly strong winds. | ||||||||||||||||||||
Tue 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | |||||||||||||||
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 9 | W 6 | W 7 | W 7 | W 7 | W 7 | W 7 | W 18 | W 7 | W 7 | W 6 | W 7 | W 7 | W 7 | W 8 | W 8 | W 8 | W 8 | W 8 | W 9 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 38 | 123 | 229 | 179 | 131 | 127 | 110 | 6 | 183 | 135 | 97 | 345 | 306 | 368 | 551 | 588 | 643 | 568 | 511 | 594 | 548 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on |
High Tide | 3:51AM1.54m | 3:53PM1.44m | 4:58AM1.54m | 5:09PM1.34m | 6:14AM1.59m | 6:39PM1.31m | 7:28AM1.68m | 8:02PM1.36m | 8:34AM1.80m | 9:10PM1.46m | 9:30AM1.92m | 10:06PM1.56m | 10:19AM2.03m | ||||||||
Low Tide | 9:22PM0.33m | 9:57AM0.60m | 10:18PM0.40m | 11:17AM0.62m | 11:27PM0.45m | 12:46PM0.57m | 00:45AM0.46m | 2:06PM0.45m | 1:59AM0.41m | 3:10PM0.30m | 3:02AM0.33m | 4:04PM0.16m | 3:57AM0.25m | ||||||||
 |  |  | | | | |  | | | |  | | | | |  |  | | | | |
 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 |
 | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | 6:47 |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | 2 | 12 | 6 | 6 | 4 | 5 |
Temp °C | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 29 | 29 | 28 | 29 | 29 | 28 |
Feels °C | 30 | 30 | 29 | 29 | 30 | 30 | 31 | 29 | 30 | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 28 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | W 9 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | W 7 | W 7 | W 14 | W 18 | SW 16 | WSW 16 | — | — | — | — | — | — | W 8 | W 8 | W 9 | W 9 |
| kJ | 38 | 24 | 21 | 21 | 21 | 127 | 110 | 4 | 6 | 11 | 25 | — | — | — | — | — | — | 568 | 511 | 594 | 548 |
Swell 2 Height (m) Direction Period (s) | WNW 8 | — | — | — | — | WSW 15 | SW 15 | W 18 | W 14 | W 13 | W 13 | — | — | — | — | — | — | W 16 | S 3 | W 20 | W 20 |
| kJ | 13 | — | — | — | — | 21 | 8 | 6 | 4 | 3 | 3 | — | — | — | — | — | — | 5 | 1 | 8 | 8 |
Swell 3 Height (m) Direction Period (s) | WSW 16 | — | — | — | — | — | W 19 | — | — | — | — | — | — | — | — | — | — | — | — | — | W 15 |
| kJ | 25 | — | — | — | — | — | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 |
Wind waves Height (m) Direction Period (s) | W 5 | W 6 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 7 | W 6 | W 7 | W 7 | W 7 | W 8 | W 8 | W 8 | WSW 9 | — | — | — |
| kJ | 34 | 123 | 229 | 179 | 131 | 59 | 45 | 111 | 183 | 135 | 97 | 345 | 306 | 368 | 551 | 588 | 643 | 222 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 635 | 635 | 636 | 4 | 4 | 4 | 4 | 24 | 636 | 635 | 635 | 636 | 636 | 636 | 617 | 601 | 636 | 82 | 4 | 24 |
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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