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Northern Rights surfForecast / Sumbawa / Indonesia
12 Day Weather and Surf, issued 1 pm Thursday 18 Sep 2025 WITA
Best Forecast Surf Conditions for Northern Rights this week:
The surf forecast for Northern Rights over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 19) at 2AM. The primary swell is predicted to be 1.2m and 13s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Northern Rights in the next 12 days are 1.5m 16s and forecast to arrive on Sunday (Sep 21) at 2PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (WITA) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 19th Sep) | 4ft (1.2m) 13s |
| Best Surf | 5PM (Wed 24th Sep) | 5ft (1.6m) 14s |
| Most Powerful | 2PM (Sun 21st Sep) | 5ft (1.5m) 16s |
Table - best surf conditions forecast for Northern Rights over the next 12 days.
Short Range Forecast Light rain (total 2mm), mostly falling on Thu afternoon. Warm (max 29°C on Thu afternoon, min 24°C on Thu night). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Warm (max 29°C on Sun afternoon, min 24°C on Sun night). Winds increasing (calm on Sun night, fresh winds from the SW by Tue afternoon). | ||||||||||||||||||||||
Thu 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 12 | 12 | 13 | 16 | 16 | 15 | 15 | 16 | 15 | 14 | 14 | 14 | 21 | 20 | 19 | 18 | 14 | 16 | 16 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 627 | 515 | 313 | 206 | 139 | 310 | 390 | 596 | 1028 | 938 | 805 | 651 | 633 | 478 | 312 | 490 | 643 | 1038 | 932 | 552 | 397 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | glass | cross- on | glass | on | cross- on | on | glass | on | on | glass | cross- on | on | on | on | on | on | on | off | glass | glass | ||
High Tide / height (m) | 10:24PM 1.18 | 8:59AM 1.49 | 10:35PM 1.26 | 9:47AM 1.51 | 10:50PM 1.35 | 10:28AM 1.50 | 11:05PM 1.42 | 11:06AM 1.46 | 11:21PM 1.49 | 11:42AM 1.39 | 11:39PM 1.54 | 12:17PM 1.29 | 11:57PM 1.57 | 12:52PM 1.18 | |||||||||
Low Tide / height (m) | 3:36PM 0.24 | 3:10AM 0.88 | 4:07PM 0.26 | 3:53AM 0.74 | 4:32PM 0.31 | 4:31AM 0.61 | 4:55PM 0.37 | 5:05AM 0.50 | 5:15PM 0.45 | 5:39AM 0.41 | 5:33PM 0.54 | 6:12AM 0.35 | 5:50PM 0.62 | 6:46AM 0.32 | |||||||||
Thu 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||||
| Sunrise | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:03 | - | - | 6:01 | - | - | 6:01 | - | - | 6:01 | ||
| Sunset | 6:08 | - | - | 6:08 | - | - | 6:08 | - | - | 6:08 | - | - | 6:07 | - | - | 6:07 | - | - | 6:07 | - | - | ||
 |  |  |  |  | | | | | | | | | | | | | | | | | |||
Rain (mm) | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | ||
| Temp. °C | 29 | 27 | 28 | 29 | 27 | 28 | 28 | 27 | 27 | 29 | 27 | 28 | 29 | 27 | 28 | 29 | 26 | 29 | 29 | 27 | 28 | ||
| Feels °C (?) | 32 | 31 | 30 | 32 | 31 | 31 | 31 | 30 | 29 | 31 | 31 | 30 | 30 | 29 | 28 | 27 | 27 | 31 | 31 | 30 | 30 | ||
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Recent Eyeball Surf Reports for Sumbawa
The wind is still cross-on at Northern Rights (light winds from the SSE at Bali International Airport 175 km from Northern Rights). No surfable waves
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Northern Rights surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Northern Rights Surf forecast
The above surf forecast table for Northern Rights provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Northern Rights can be found by selecting the local surf guide option on the grey menu. Our Northern Rights 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 (Northern Rights) 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 Northern Rights 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.
Northern Rights is 53 km (33 miles) from the city of Praya. If you plan a holiday in Sumbawa, look for hotels and other accommodation in Praya. Praya has rooms for a wide range of budgets as well as car hire and transport links.
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