Reef

left

Level 5/10

Grupuk Bay (Don Don)

S Lombok, Indonesia

🪸Sharp reef🚶Difficult access

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Grupuk Bay hosts multiple surf breaks accessible by local boat, with Don Don being one of the standout lefts in the collection. The bay setting on Lombok's south coast provides a sheltered environment with several reef breaks offering different characteristics depending on swell and tide. The local boat shuttle system from Grupuk village makes access easy and affordable, creating a surf camp atmosphere popular with traveling surfers.

Grupuk Bay (Don Don) surf forecast

Model forecast for swell, wind and tide.

10-Day Forecast

Today20

Fair

1.7mSW@17s

17km/h

1.7m@17s

17km/h

Mon21

Fair

1.7mSW@15s

16km/h

1.7m@15s

16km/h

Tue22

Fair

1.3mSW@14s

19km/h

1.3m@14s

19km/h

Wed23

Fair

1.8mSSW@16s

16km/h

1.8m@16s

16km/h

Thu24

Fair

1.5mSSW@15s

15km/h

1.5m@15s

15km/h

Fri25

Fair

1.3mSSW@14s

14km/h

1.3m@14s

14km/h

Sat26

Fair

1.0mSSW@14s

11km/h

1.0m@14s

11km/h

Sun27

Fair

2.3mSSW@18s

13km/h

2.3m@18s

13km/h

Mon28

Fair

1.9mSSW@16s

18km/h

1.9m@16s

18km/h

Tue29

Fair

1.5mSSW@15s

14km/h

1.5m@15s

14km/h

5+ days out, less certain

View 2-year historical scores →

Today's Conditions

Find Flights

Best session: MorningAM 12 km/h · PM 19 km/h · Mid tide at 9am (1.0m)

Swell

1.7m

SW(221°)

Score: 19/25

Period

17s

Long period groundswell

Score: 23/25

Wind

17km/h

SE(128°)

Score: 1/25

Weather

28°C

0.0mm17%

First light 5:35amSunrise 6:05amSunset 6:10pmLast light 6:40pm

Windswell0.3m@2sSecondary0.5mConfidence

100%

Location & Conditions

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Swell

Wind

Showing forecast for today

Hourly Forecast, Tide & Strike Windows

Strike window: 5:35am–6:40pm · through lowIdeal tide: 0.7–1.8m

6am

9am

12pm

3pm

6pm

6am

9am

12pm

3pm

6pm

6am

9am

12pm

3pm

6pm

6am

9am

12pm

3pm

6pm

6am

9am

12pm

3pm

6pm

6am

9am

12pm

3pm

6pm

6am

9am

12pm

3pm

6pm

6am

9am

12pm

3pm

6pm

6am

9am

12pm

3pm

6pm

6am

9am

12pm

3pm

6pm

°C

25°

29°

30°

29°

26°

25°

29°

30°

29°

26°

25°

29°

30°

29°

26°

25°

29°

30°

29°

27°

26°

29°

31°

29°

27°

26°

29°

30°

28°

27°

28°

30°

28°

27°

28°

30°

28°

27°

28°

30°

28°

27°

29°

30°

28°

3m1.5

sec

17s

15s

14s

16s

15s

14s

18s

16s

15s

swell

windkm/h

11g23

13g31

21g45

21g46

18g36

11g21

11g28

20g45

19g45

14g33

10g18

16g36

22g48

22g49

18g36

10g19

12g29

18g41

19g46

17g41

12g23

10g27

18g41

20g47

15g41

8g21

10g25

16g40

18g43

16g43

6g22

5g25

12g35

17g41

15g40

12g24

11g28

13g41

14g46

13g39

15g30

17g36

19g41

20g45

18g45

11g25

12g28

16g39

17g45

13g43

tidem

1:48am2.0m

9:03am1.0m

3:10pm1.4m

7:10pm1.3m

2:54am1.8m

11:30am1.1m

9:00pm1.5m

5:54am1.7m

1:40pm0.9m

8:30pm1.7m

1:47am1.3m

7:30am1.9m

2:19pm0.8m

8:43pm1.9m

2:25am1.1m

8:18am2.1m

2:46pm0.6m

9:03pm2.2m

2:58am0.8m

8:57am2.3m

3:11pm0.5m

9:22pm2.4m

3:27am0.5m

9:30am2.5m

3:36pm0.4m

9:44pm2.6m

3:56am0.3m

10:00am2.5m

4:00pm0.4m

10:05pm2.8m

4:24am0.1m

10:30am2.6m

4:26pm0.3m

4:55am0.0m

Ideal tideStrike windowNight

Tide times today

1:48 am

High tide - 1.99m

9:03 am

Low tide - 0.97m

3:10 pm

High tide - 1.37m

7:10 pm

Low tide - 1.25m

Times shown in spot-local time.

Strike Score Breakdown

Fair

Components

Swell Direction15/25

Swell Size19/25

Swell Period23/25

Wind1/25

Raw Score58/100

Adjustments

Wind History-1

🌊 Tide+5

💨 Gusty Wind-5

⚠️ Weak Component-5

Adjusted Score52/100

Confidence

Multiplier×1.00

Final Score52

🌊 Optimal tide window

Plan Your Strike

Return flights to LOP, departing today with a 5-day trip window.

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Location & Conditions

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Swell

Wind

Showing forecast for today

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Spot Details

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Swell Requirements

Optimal direction: SSW (205°)
Direction range: 190° - 220°
Size range: 0.9m - 1.8m
Ideal size: 1.3m - 1.6m
Height multiplier: 0.90×
Ideal period: 14s+

Wind Requirements

Optimal direction: N (0°)
Offshore range: 330° - 30°

Tide Requirements

Optimal tide: mid to high
Optimal range: 0.7m - 1.8m

Water temp

28°C

Wetsuit

Boardshorts / Rashguard

Difficulty

5/10

Crowd level

4/10

Access: Road access varies by season; local guide/boat support is often used when the track or tide window is poor.

Frequently Asked Questions

What tide is best at Grupuk Bay (Don Don)?

The Grupuk Bay (Don Don) profile favors mid to high tide, ideally between 0.7m and 1.8m on the local tide chart. Compare this preference with the forecast tide and local conditions before choosing a session.

What wind direction is offshore at Grupuk Bay (Don Don)?

The Grupuk Bay (Don Don) profile uses wind from N (0°) as its preferred direction, with an offshore range of 330° to 30°. Wind speed matters too: light winds outside that range can still produce surfable conditions, while strong offshore winds can make takeoffs difficult.

What swell size and direction work best at Grupuk Bay (Don Don)?

The Grupuk Bay (Don Don) scoring profile favors swell from SSW (190° to 220°), a swell-height range of 0.9m to 1.8m, and a reference period of 14s. These are model inputs, not guaranteed breaking-wave heights or a promise that the surf will suit every ability.

When is the best time of year to surf Grupuk Bay (Don Don)?

The main season at Grupuk Bay (Don Don) is Apr-Oct. A secondary window runs Nov, Dec, Jan, Feb, Mar. Best Apr-Oct (dry season, SE trades offshore). Swells year-round but wet season brings onshore winds.

How do I get to Grupuk Bay (Don Don)?

The spot profile lists LOP as a nearby airport. The estimated road transfer is 60 minutes. Road access varies by season; local guide/boat support is often used when the track or tide window is poor.