Reef
right
Level 6/10

Periscopes

East Sumbawa, Indonesia
🌀Strong rips🪸Sharp reef

Periscopes is a long, rippable right reef break in East Sumbawa that produces tight barrels over a safe reef platform. The wave works best at high tide and provides a quality alternative to Lakey Peak, offering longer rides with good barrel and turn sections. Its exposure to dry season SE trade winds can cause afternoon blow-out, making morning sessions essential for clean conditions.

10-Day Forecast
Thu6
70
Good
2.1m@17s
8km/h
Fri7
74
Good
2.3m@16s
7km/h
Sat8
63
Fair
2.6m@16s
10km/h
Sun9
69
Good
2.3m@16s
10km/h
Mon10
64
Fair
2.2m@15s
13km/h
Tue11
41
Poor
2.9m@17s
15km/h
Wed12
74
Good
2.1m@15s
10km/h
Thu13
59
Fair
2.7m@17s
12km/h
Fri14
69
Good
2.3m@16s
12km/h
Sat15
63
Fair
1.6m@16s
10km/h
5+ days out, less certain

Today's Conditions

Find Flights
Best session: MorningAM 1 km/h · PM 13 km/h
Swell
2.1m
SW(215°)
Score: 20/25
Period
17s
Long period groundswell
Score: 23/25
Wind
8km/h
SW(219°)
Score: 13/25
Weather
28°C
0.0mm54%
First light 5:49amSunrise 6:19amSunset 6:05pmLast light 6:35pm
Windswell0.2m@2sSecondary0.5mConfidence
100%

Location & Conditions

Loading map...
0°45°90°135°180°225°270°315°NESW
Swell
Wind
Showing forecast for today

Hourly Forecast, Tide & Strike Windows

Strike window: 5:49–6:25am · droppingStrike window: 10:18am–6:14pm · through highIdeal tide: 1.0–2.0m
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
21°
26°
32°
31°
27°
23°
28°
32°
32°
29°
23°
28°
31°
30°
26°
22°
25°
32°
30°
26°
23°
26°
30°
28°
26°
24°
27°
30°
29°
27°
23°
25°
29°
31°
28°
24°
27°
30°
30°
28°
23°
26°
30°
31°
28°
24°
27°
30°
31°
28°
3m1.5
sec
17s
17s
17s
17s
17s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
15s
15s
15s
15s
15s
17s
17s
17s
17s
17s
15s
15s
15s
15s
15s
17s
17s
17s
17s
17s
16s
16s
16s
16s
16s
16s
16s
16s
16s
16s
swell
windkm/h
1g5
1g14
8g23
15g34
12g32
4g9
2g12
6g21
11g27
6g21
4g8
1g12
11g28
17g39
17g42
1g7
3g16
12g28
16g36
15g39
3g8
4g16
12g32
24g54
17g48
7g16
9g22
17g40
22g52
17g52
1g12
2g13
13g32
18g44
14g46
3g11
3g16
15g36
21g49
14g50
2g8
3g14
16g36
21g50
13g52
3g9
1g15
13g33
18g44
12g45
tidem
1:48am2.6m
8:21am0.6m
2:08pm2.0m
7:54pm0.8m
2:30am2.5m
9:18am0.7m
3:08pm1.7m
8:30pm1.0m
3:21am2.3m
10:46am0.8m
4:50pm1.5m
9:20pm1.2m
4:54am2.2m
12:54pm0.8m
7:45pm1.5m
6:48am2.3m
2:25pm0.6m
9:00pm1.8m
1:55am1.1m
8:13am2.5m
3:16pm0.3m
9:33pm2.1m
3:03am0.9m
9:13am2.7m
3:54pm0.1m
10:10pm2.4m
3:51am0.6m
9:59am2.9m
4:30pm0.0m
4:31am0.4m
10:40am3.0m
5:01pm0.0m
5:11am0.3m
Ideal tideStrike windowNight

Tide times today

1:48 am
High tide - 2.57m
8:21 am
Low tide - 0.62m
2:08 pm
High tide - 1.97m
7:54 pm
Low tide - 0.76m
Times shown in spot-local time.

Strike Score Breakdown

70
Good
Components
Swell Direction18/25
Swell Size20/25
Swell Period23/25
Wind13/25
Raw Score74/100
Adjustments
🌊 Tide+1
💨 Gusty Wind-5
Adjusted Score70/100
Confidence
Multiplier×1.00
Final Score70
🌊 Partly in the tide window

Plan Your Strike

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

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Swell Requirements

Optimal direction
SSW (205°)
Direction range
190° - 220°
Size range
0.9m - 2.4m
Ideal size
1.9m
Height multiplier
0.97×
Ideal period
14s+

Wind Requirements

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

Tide Requirements

Optimal tide
high
Optimal range
1m - 2m

Water temp

28°C

Wetsuit

Boardshorts / Rashguard

Difficulty

6/10

Crowd level

4/10

Frequently Asked Questions

What tide is best at Periscopes?

Periscopes works best on a high tide, ideally between 1m and 2m on the local tide chart. The tide chart above shows today’s strike window.

What wind direction is offshore at Periscopes?

Offshore wind at Periscopes blows from the N (0°). Anything in the 330° to 30° range grooms the faces; outside it, expect chop or bumpy conditions.

What swell size and direction work best at Periscopes?

Periscopes wants SSW swell (190° to 220°) between 0.9m and 2.4m, with a period of 14s or more for quality waves.

When is the best time of year to surf Periscopes?

The main season at Periscopes 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 Periscopes?

Fly into BMU, then allow about 30 minutes by road.

What kind of wave is Periscopes?

Periscopes is a reef break, a right-hander. Difficulty is rated 6/10.

Best Season

Peak: Apr-Oct

Secondary: Nov, Dec, Jan, Feb, Mar

Best Apr-Oct (dry season, SE trades offshore). Swells year-round but wet season brings onshore winds.

Getting There

Airport
BMU
Drive time
30 min
Data quality
verified

Strike Log

Community Discussion