Reef
left
Level 9/10

Banana Island Left

South Sumatra (Krui), Indonesia
🪸Sharp reef🚶Difficult access😮‍💨Hold-downs🏝️Remote

Banana Island Left is a fickle but heavy left reef break accessed by 15-minute boat ride from Krui on the south coast of Sumatra. The wave is a tube master's playground when it fires, producing sucky, pitching barrels over shallow reef in warm, clear water. Its fickle nature—requiring specific off-season W winds—keeps crowds minimal and rewards patient surfers who time their visit right. Expert surfing skills are essential.

Banana Island Left surf forecast

Model forecast for swell, wind and tide.

10-Day Forecast
Today20
63
Fair
2.4m@14s
11km/h
Mon21
60
Fair
2.2m@12s
11km/h
Tue22
69
Good
1.8m@13s
11km/h
Wed23
39
Poor
2.2m@11s
14km/h
Thu24
48
Fair
1.8m@11s
13km/h
Fri25
55
Fair
1.3m@12s
11km/h
Sat26
77
Good
1.8m@17s
11km/h
Sun27
60
Fair
2.7m@15s
13km/h
Mon28
63
Fair
2.2m@13s
15km/h
Tue29
54
Fair
1.9m@11s
13km/h
5+ days out, less certain

Today's Conditions

Find Flights
Best session: MorningAM 7 km/h · PM 13 km/h · Tide at 7am (0.3m)
Swell
2.4m
SSW(211°)
Score: 15/25
Period
14s
Long period groundswell
Score: 25/25
Wind
11km/h
SSE(158°)
Score: 9/25
Weather
27°C
0.0mm68%
First light 5:24amSunrise 5:54amSunset 6:00pmLast light 6:30pm
Windswell0.3m@2sSecondary1.0mConfidence
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

No ideal tide during daylight todayIdeal tide: 0.5–1.5m
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
24°
28°
29°
27°
26°
24°
29°
29°
28°
25°
24°
28°
29°
28°
26°
24°
28°
29°
28°
26°
25°
27°
29°
28°
26°
25°
28°
29°
28°
26°
24°
26°
29°
29°
26°
25°
27°
29°
29°
26°
26°
27°
29°
29°
27°
25°
26°
29°
29°
27°
3m1.5
sec
14s
14s
14s
13s
13s
12s
12s
12s
11s
11s
10s
17s
14s
12s
10s
12s
12s
12s
11s
11s
11s
10s
11s
11s
11s
11s
12s
17s
12s
12s
16s
17s
17s
16s
16s
15s
15s
15s
15s
15s
14s
14s
13s
13s
13s
11s
11s
11s
11s
11s
swell
windkm/h
7g14
8g22
16g37
12g30
14g28
7g13
9g25
13g40
12g35
9g25
9g16
8g23
15g38
13g33
11g28
11g21
13g32
19g45
15g48
11g37
9g20
15g35
17g44
14g42
10g34
8g18
11g31
15g40
12g41
9g37
10g20
9g25
11g34
12g37
12g37
9g19
10g27
15g40
15g44
13g40
10g20
12g28
19g42
18g48
12g48
9g22
7g30
17g44
17g48
12g46
tidem
7:00am0.3m
12:30pm0.4m
4:30pm0.3m
12:54am0.7m
8:30am0.3m
3:30pm0.5m
2:30am0.7m
10:00am0.3m
4:30pm0.6m
9:00pm0.5m
3:40am0.8m
10:42am0.2m
4:50pm0.7m
10:18pm0.4m
4:38am0.8m
11:10am0.2m
5:21pm0.8m
5:16am0.9m
11:37am0.2m
5:50pm0.9m
6:00am0.9m
12:02pm0.1m
6:15pm1.0m
6:36am0.9m
12:30pm0.1m
6:48pm1.1m
1:11am0.0m
7:15am0.9m
1:00pm0.1m
7:20pm1.2m
1:55am0.0m
Ideal tideStrike windowNight

Tide times today

7:00 am
Low tide - 0.28m
12:30 pm
High tide - 0.41m
4:30 pm
Low tide - 0.35m
Times shown in spot-local time.

Strike Score Breakdown

63
Fair
Components
Swell Direction20/25
Swell Size15/25
Swell Period25/25
Wind9/25
Raw Score69/100
Adjustments
🌊 Tide-1
💨 Gusty Wind-5
Adjusted Score63/100
Confidence
Multiplier×1.00
Final Score63
🌊 Slightly below optimal tide

Plan Your Strike

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

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Swell Requirements

Optimal direction
SSW (205°)
Direction range
190° - 220°
Size range
1.2m - 2.4m
Ideal size
1.7m - 2.1m
Height multiplier
0.97×
Ideal period
14s+

Wind Requirements

Optimal direction
W (270°)
Offshore range
240° - 300°

Tide Requirements

Optimal tide
mid
Optimal range
0.5m - 1.5m

Water temp

28°C

Wetsuit

Boardshorts / Rashguard

Difficulty

9/10

Crowd level

4/10

Access: Boat access to Banana Island is required from the Krui/South Sumatra coast.

Frequently Asked Questions

What tide is best at Banana Island Left?

The Banana Island Left profile favors mid tide, ideally between 0.5m and 1.5m 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 Banana Island Left?

The Banana Island Left profile uses wind from W (270°) as its preferred direction, with an offshore range of 240° to 300°. 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 Banana Island Left?

The Banana Island Left scoring profile favors swell from SSW (190° to 220°), a swell-height range of 1.2m to 2.4m, 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 Banana Island Left?

The main season at Banana Island Left 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 Banana Island Left?

The spot profile lists TKG as a nearby airport. The estimated road transfer is 240 minutes. A boat transfer is also required. The profile estimates $80 USD; confirm the current price and departure point with an operator. Boat access to Banana Island is required from the Krui/South Sumatra coast.

What kind of wave is Banana Island Left?

Banana Island Left is a reef break, a left-hander. Difficulty is rated 9/10.

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
TKG
Drive time
240 min
Boat required
$80
Data quality
verified

Strike Log

Community Discussion