Selong Belanak

Serangan Beach surf forecast

Seven-day offshore wave, swell and wind forecasts with estimated tides for South Lombok, Indonesia. Hourly times are WITA (UTC+8).

Reef break · Not suitable for beginners

Latest Serangan surf photo

A beach photo and conditions reported by our local team.

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Selected hour: 02:00 WITA, Thu, 15 Oct

Offshore waves
1.7 m10.7 s from SSW
Swell
1.5 m10.7 s from SSW
Wind at 10 m
8.6 knFrom ESE. Gusts 15.7 kn
Estimated tide
+0.71 mFalling
Mean sea levelNext low around 06:00 WITA
-0.88 m
Clear sky
26.7 °CModeled water 27.2 °C
Rain chance 0 %

Retrieved Thu, 15 Oct at 02:30 WITA. All times are WITA (UTC+8).

Seven-day outlook

Choose a day, then an hour to update the coastal map and tide reading. Daily ranges below are combined offshore wave height; wind is in knots.

Hourly forecast for Thursday 15 October, WITA.

Coastal forecast map

Thu, 15 Oct, 02:00 WITA

Loading the coastal basemap…

N

Regional swell

1.5 m

From SSW

Travels NNE10.7 sTime between swell wavesSecondary swell 0.7 m, 4.2 s from SSE

Wind at 10 m

8.6 kn

From ESE

Travels WNWGusts 15.7 kn
Swell height (m)Fixed scale for every hour

Serangan Beach · regional offshore reference

1.5 m
0 m1 m2 m3 m4+ m

Loading forecast colours… Regional readings are still shown.

Map data details

Open-Meteo, Météo-France MFWAM. Colour data retrieved Thu, 15 Oct 02:30 WITA; this is our retrieval time, not a model issue time.

All three beaches share the same regional swell and wind model cells. One set of readings represents the area. Colour blocks show the regional offshore model in the local water area. Timeline values use the selected beach’s regional reference. Wind is a regional reading.

Explore the hours

Colours show the outlook. Tap an hour for details. Swipe through seven days.

Reef break · Not suitable for beginners

Use left and right arrows to select an hour, Page Up or Page Down to move a day, and Home or End to reach the start or end. Values below are the selected beach’s regional forecast reference.

Thu, 15 Oct 02:00 WITASwell 1.5 m · 10.7 sWind 8.6 knEstimated tide +0.71 m · Falling

Estimated tide · metres relative to mean sea level · WITA. Gaps mean unavailable data.

Thu, 15 Oct
Estimated tide for Thu, 15 Oct, WITA. Each point aligns with the hour button below. Metres relative to mean sea level.0 m
Fri, 16 Oct
Estimated tide for Fri, 16 Oct, WITA. Each point aligns with the hour button below. Metres relative to mean sea level.0 m
Sat, 17 Oct
Estimated tide for Sat, 17 Oct, WITA. Each point aligns with the hour button below. Metres relative to mean sea level.0 m
Sun, 18 Oct
Estimated tide for Sun, 18 Oct, WITA. Each point aligns with the hour button below. Metres relative to mean sea level.0 m
Mon, 19 Oct
Estimated tide for Mon, 19 Oct, WITA. Each point aligns with the hour button below. Metres relative to mean sea level.0 m
Tue, 20 Oct
Estimated tide for Tue, 20 Oct, WITA. Each point aligns with the hour button below. Metres relative to mean sea level.0 m
Wed, 21 Oct
Estimated tide for Wed, 21 Oct, WITA. Each point aligns with the hour button below. Metres relative to mean sea level.0 m
KeyPotentially goodLess favourableDangerousUnconfirmed

02:00 WITALess favourable

Stronger wind or gusts · less favourable under the initial wind guidance.

Local preference: low tide with NW–NNW or nearly still wind.

Wind and tide guidance · low confidence. Swell needs a local check. Potentially good applies to surfers with suitable experience; it does not mean safe.

South Lombok, Indonesia. Pins identify beach areas. Labels show where swell and wind come from; arrows show where they travel. Period is the time between waves. Select an hour to update the forecast.

Daily tide chart & high / low waterThu, 15 Oct · WITA

Estimated high and low water from an hourly sea-level model. Heights are relative to mean sea level. The same regional tide reference is used for all three beaches.

Hourly tide data available through Thu, 22 Oct, 23:00 WITA.

Estimated tide curve for Thu, 15 Oct, WITAHourly modelled sea level in metres relative to mean sea level. Dots show hourly predictions, H and L mark sampled high and low water. Gaps mean unavailable data. Values and event times are listed below.-1.00.02.0LHL00:0008:0016:0023:00

Metres relative to mean sea level · dots are hourly predictions · H high / L low

Low water
Around 06:00-0.88 m · WITA
High water
Around 12:00+1.02 m · WITA
Low water
Around 17:00–18:00-0.34 m · WITA

Regional estimates, not a locally validated tide table. Allow for differences at the beach.

Tide source and limits

Open-Meteo marine API, Météo-France SMOC, approximately 8 km resolution. Sea level includes tides, air pressure and other ocean effects. Coastal accuracy is limited. These are model predictions, not observed readings or water depth above chart datum. The reference is global mean sea level, not lowest astronomical tide.

High and low water are estimated from neighbouring hourly samples, without minute-level interpolation. The actual turning time may fall between samples. Flat turning periods are shown as a time range; missing data and forecast edges cannot create events.

Model grid: -8.875, 116.125015. Available Wed, 14 Oct 00:00 to Thu, 22 Oct 23:00 WITA. Retrieved Thu, 15 Oct 02:30 WITA; this is our retrieval time, not a model issue time.

Offshore waves & swell

Significant wave height in metres

Combined wavesSwell
Offshore wave and swell height for Thu, 15 OctHourly forecast in metres. Gaps indicate missing data. Exact values and directions appear in the hourly table below.0.01.02.000:0008:0016:0023:00

Wind & gusts

Knots at 10 m

WindGusts
Wind and gusts for Thu, 15 OctHourly forecast in knots. Gaps indicate missing data. Exact values and directions appear in the hourly table below.0153000:0008:0016:0023:00

Hour by hour

Directions name where waves and wind come from; arrows show their travel direction. Scroll the table sideways for all values.

Serangan Beach: Thu, 15 Oct. Times in WITA. A dash means unavailable.
TimeOffshore wavesSwellWind at 10 mWeatherModeled waterTide estimate
00:001.8 m10.6 s from SSW1.5 m10.8 s from SSW9.3 kn from ESEGusts 16.7 knMainly clear 27.0 °CRain chance 0 %27.3 °C1.56 mMean sea level
01:001.7 m10.7 s from SSW1.5 m10.7 s from SSW8.9 kn from ESEGusts 16.5 knMainly clear 26.9 °CRain chance 0 %27.2 °C1.23 mMean sea level
02:001.7 m10.7 s from SSW1.5 m10.7 s from SSW8.6 kn from ESEGusts 15.7 knClear sky 26.7 °CRain chance 0 %27.2 °C0.71 mMean sea level
03:001.7 m10.8 s from SSW1.5 m10.7 s from SSW8.5 kn from ESEGusts 15.2 knMainly clear 26.6 °CRain chance 0 %27.2 °C0.11 mMean sea level
04:001.7 m10.8 s from SSW1.5 m10.7 s from SSW8.8 kn from ESEGusts 15.6 knClear sky 26.7 °CRain chance 0 %27.2 °C-0.42 mMean sea level
05:001.6 m10.9 s from SSW1.5 m10.7 s from SSW9.2 kn from ESEGusts 16.1 knPartly cloudy 26.4 °CRain chance 0 %27.1 °C-0.78 mMean sea level
06:001.6 m10.9 s from SSW1.4 m10.7 s from SSW9.0 kn from ESEGusts 16.1 knMainly clear 26.4 °CRain chance 0 %27.1 °C-0.88 mMean sea level
07:001.6 m10.9 s from SSW1.4 m10.6 s from SSW10.1 kn from ESEGusts 19.2 knMainly clear 27.2 °CRain chance 0 %27.1 °C-0.70 mMean sea level
08:001.6 m10.9 s from SSW1.4 m10.6 s from SSW10.2 kn from ESEGusts 20.8 knMainly clear 28.6 °CRain chance 2 %27.1 °C-0.31 mMean sea level
09:001.6 m10.9 s from SSW1.4 m10.6 s from SSW11.0 kn from SEGusts 22.7 knDrizzle 29.4 °CRain chance 24 %27.2 °C0.17 mMean sea level
10:001.6 m10.8 s from SSW1.4 m10.6 s from SSW11.5 kn from SEGusts 24.1 knDrizzle 30.0 °CRain chance 54 %27.2 °C0.61 mMean sea level
11:001.6 m10.8 s from SSW1.4 m10.5 s from SSW11.2 kn from SEGusts 24.1 knDrizzle 30.4 °CRain chance 75 %27.3 °C0.92 mMean sea level
12:001.6 m10.7 s from SSW1.4 m10.4 s from SSW11.5 kn from SEGusts 24.7 knDrizzle 30.6 °CRain chance 80 %27.4 °C1.02 mMean sea level
13:001.6 m10.5 s from SSW1.4 m10.4 s from SSW12.3 kn from SEGusts 26.0 knClear sky 30.5 °CRain chance 76 %27.4 °C0.90 mMean sea level
14:001.6 m10.3 s from SSW1.4 m10.4 s from SSW13.1 kn from SEGusts 27.4 knMainly clear 30.1 °CRain chance 71 %27.5 °C0.61 mMean sea level
15:001.6 m10.3 s from SSW1.3 m10.3 s from SSW12.2 kn from SEGusts 27.4 knMainly clear 29.6 °CRain chance 70 %27.5 °C0.22 mMean sea level
16:001.5 m10.2 s from SSW1.3 m10.3 s from SSW10.9 kn from SEGusts 25.5 knMainly clear 29.1 °CRain chance 68 %27.5 °C-0.13 mMean sea level
17:001.5 m10.1 s from SSW1.3 m10.3 s from SSW10.3 kn from SEGusts 22.5 knOvercast 28.4 °CRain chance 61 %27.4 °C-0.34 mMean sea level
18:001.5 m10.0 s from SSW1.3 m10.2 s from SSW10.3 kn from SEGusts 20.6 knPartly cloudy 27.4 °CRain chance 42 %27.4 °C-0.34 mMean sea level
19:001.5 m9.9 s from SSW1.3 m10.2 s from SSW10.6 kn from SEGusts 20.0 knDrizzle 27.2 °CRain chance 18 %27.4 °C-0.12 mMean sea level
20:001.5 m9.9 s from SSW1.3 m10.2 s from SSW10.6 kn from SEGusts 20.8 knMainly clear 27.2 °CRain chance 0 %27.3 °C0.29 mMean sea level
21:001.5 m9.9 s from SSW1.3 m10.1 s from SSW10.4 kn from ESEGusts 20.6 knMainly clear 27.1 °CRain chance 0 %27.3 °C0.77 mMean sea level
22:001.5 m9.9 s from SSW1.3 m10.1 s from SSW10.3 kn from ESEGusts 19.0 knMainly clear 27.1 °CRain chance 0 %27.3 °C1.19 mMean sea level
23:001.4 m9.9 s from SSW1.2 m10.1 s from SSW9.8 kn from ESEGusts 18.7 knMainly clear 27.0 °CRain chance 0 %27.2 °C1.46 mMean sea level

Surfing at Serangan Beach

This Serangan Beach is on Lombok’s south coast near Selong Belanak, Indonesia, not on Bali. Its right-hand reef break suits confident intermediate and advanced surfers and is not suitable for beginners. Winds from the northwest to north-northwest can be offshore here, blowing toward the southeast to south-southeast. These favourable winds generally align with the wet-season pattern.

Read the South Lombok beach comparison.

Serangan wind and low tide

Local guidance favours low tide for the Serangan wave. During the dry season, low tide can still offer good waves when the wind is nearly still, often early in the morning. Check the actual wind rather than relying on the time of day. Swell and reef exposure still matter; confirm conditions locally. The tide estimates here use a regional sea-level model and need local confirmation.

Reading this forecast

Offshore waves and swell

Combined waves describe the significant offshore sea state, including swell and wind waves. Swell is shown separately with its period and source direction. Neither height is a prediction of the waves breaking on the beach.

Wind direction

Wind directions name where the wind comes from. An easterly wind (E) blows from east toward west; a northwesterly (NW) blows from northwest toward southeast. Offshore wind blows from land toward sea, so the favourable direction depends on the beach.

Conditions colour key

The hour colours compare the forecast wind and estimated tide with local and published guidance. Confidence is low while the rules are refined. Green means potentially good for surfers with suitable experience; swell and breaking waves need a local check. Grey means guidance, data or local wind exposure is unconfirmed. Mawi turns red at an offshore wave height of 5 m or above; lower heights are not a safety assurance.

The initial wind limits are provisional: nearly still means wind and gusts at most 3 kn; favourable offshore wind is at most 10 kn, with gusts at most 15 kn. Estimated low tide is the lower third of the range between neighbouring high and low water; mid tide is the middle third. Mawi also allows higher tide, especially for its right; light ESE–SE wind remains unconfirmed until checked locally. These starting limits need local calibration. Selong Belanak remains unconfirmed while its tide preference is pending.

A regional view of the coast

These three beaches share the same offshore and wind model grid cells, so their forecasts can match. Local shelter, seabed and shoreline shape can change conditions at the beach. Check conditions locally before heading into the water.

Explore the beach guide or find a local surf school.

Forecast data: Open-Meteo and its weather services, including DWD. Data licensed under CC BY 4.0. Hourly values are grouped into daily ranges for this guide.

Forecast sources and location
Beach-area reference
-8.8690049, 116.1415999
Offshore model grid
-8.875, 116.125015
Weather model grid
-8.892794, 116.19171
Source retrieved
Thu, 15 Oct 02:30 WITA. This is our retrieval time, not a model issue time.
Documentation
Marine forecast and weather forecast.