Singapore Strait ferry weather
Check wind, waves and thunderstorms around Singapore Strait today and tomorrow, with guidance for fast ferries between Singapore, Batam and nearby Indonesian terminals.
These are short, high-frequency fast-ferry routes. Squalls and gusty thunderstorms can matter more than long ocean swell.
Singapore Strait outlook
Waves to 0.1 m · 8 kt winds · gusts 12 kt
Calm outlook for most ferry passengers.Waves to 0.2 m · 11 kt winds · gusts 16 kt
Calm outlook for most ferry passengers.Currently looking broadly similar to today and tomorrow.
5-day trend · Lower confidenceGenerally comfortable conditions on a conventional ferry.
Singapore Strait is a short-crossing weather problem, not an ocean-swell problem
Passenger ferries leave Singapore throughout the day for Batam and other Riau Island terminals. The routes are relatively short and use fast passenger craft, so the most relevant weather is often local: wind waves, thunderstorms, gust fronts and sudden visibility changes rather than long-period ocean swell.
The strait is also one of the world’s busiest shipping corridors. That commercial traffic is important operationally, but for passenger comfort the weather question remains simple: what are the wind and short-wave conditions during your actual crossing window?
Singapore Strait wave forecast
Zoom across the water south of Singapore towards Batam rather than checking Singapore city weather alone. A tropical thunderstorm can affect one part of the crossing while another remains relatively calm.
Why Singapore ferry weather can change in less than an hour
Singapore’s climate is dominated by the Northeast and Southwest Monsoons, with inter-monsoon periods in between. But the feature ferry passengers are most likely to notice is the thunderstorm: local convection and organised squall lines can produce sudden rain, poor visibility and strong gusts.
During the Southwest Monsoon, Sumatra squalls can move eastwards from the Strait of Malacca and cross Singapore, sometimes during the pre-dawn or morning period. Singapore’s meteorological service also provides dedicated 24-, 48- and 72-hour wind-wave forecasts for local marine conditions.
Northeast Monsoon
Wet-phase monsoon surges can bring prolonged rain and stronger winds, especially earlier in the season.
Inter-monsoon
Light background winds can be interrupted by strong afternoon or evening thunderstorms.
Southwest Monsoon
Sumatra squalls can bring widespread thundery showers and gusty winds, sometimes in the morning.
Inter-monsoon again
Thunderstorms remain important and can be locally severe even when the broad marine forecast looks modest.
Singapore-Batam ferry weather
Current BatamFast and Sindo schedules show departures spread from morning into late evening between Singapore and Batam. That frequency is useful when planning, but a later boat is not automatically calmer: compare the forecast by hour rather than assuming conditions improve through the day.
Singapore and Batam use different time zones
Singapore uses GMT+8 while Batam uses Western Indonesia Time, GMT+7. Ferry timetables therefore list departure and arrival-side times in their local time zones. That matters when matching a sailing to a weather forecast: compare the forecast using the local clock for the point you are checking.
Small waves can still create a sharp ride
Singapore-Batam services use fast passenger ferries rather than large overnight ships. In short, closely spaced waves they can feel more active than a much larger conventional ferry would in the same headline wave height.
If the live outlook is elevated, read the fast ferry versus large ferry guide and the seasickness guide.
Complete the Singapore Strait weather check
Use the live route-area outlook, then check Singapore’s marine forecast and the current operator schedule.