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    How Do I Know if a Storm is Coming? A Sailor’s Guide to Storm Prediction

    Written by
    Master Sailing Malta Team
    Published on

    Knowing when a storm is approaching is essential for safe sailing, whether you’re on a Malta sailing charter, practicing skills in a sailing course med, or simply enjoying a coastal cruise. Here are four key ways to predict storms and prepare for changing weather at sea.


    🌦️ 1. Check the Latest Weather Forecasts

    Modern weather forecasts are the most reliable source for predicting storms. In the UK and many coastal regions, the Coastguard issues detailed weather updates every 3 hours. These include inshore forecasts and shipping forecasts, often broadcast on BBC Radio 4 LW and FM. Always note the time the forecast was issued and listen regularly to stay updated.

    Useful websites for sailing weather forecasts:

            •        weatheronline.co.uk
            •        passageplanner.com
            •        predictwind.com
            •        windguru.com

    For personalized, detailed weather forecasts especially tailored for sailors, services like meteogib.com provide expert guidance for a small fee.


    🌡️ 2. Use Barometer Readings to Detect Pressure Changes

    A barometer is a sailor’s trusted tool for spotting storms before they arrive.

            •        Rapid drops or rises in barometric pressure signal strong winds and possible storms.

            •        If your barometer falls or rises more than 10 millibars over 3 hours, expect storm-force winds.

            •        A change of 4 millibars per hour usually means gale-force winds are on their way.

    Keeping a regular log of barometer readings helps you understand local weather patterns and increases your ability to anticipate storms.


    🌤️ 3. Watch the Sky and Sea Conditions

    Nature often signals storms well before they strike. Look out for:

            •        Increasing swell or rougher seas — a sign that big weather is approaching.

            •        “Mackerel skies” or “mare’s tails” — wispy, streaky clouds that indicate a weather change within 24–36 hours.

            •        Clouds getting lower and thicker, or puffy clouds growing rapidly, can mean thunderstorms are forming.

            •        A circle or halo around the moon often predicts rain or wet weather ahead.

            •        A red sky at night in the west is usually a good sign, meaning dry weather is coming your way.

    These natural signs, combined with forecasts and instruments, give you a fuller picture of what’s coming.


    🧭 4. Plan Your Passage With Weather in Mind

    Use reliable weather websites and forecasts while planning your sailing route to avoid storms and adverse conditions. Aligning your departure times and routes with predicted weather can keep your sailing experience safe and enjoyable, whether you’re on a Malta sailing charter or taking an RYA sailing course med.


    ⚓ Stay Safe and Prepared

    By combining modern weather forecasts, traditional barometer readings, natural observations, and smart passage planning, you can stay one step ahead of storms. Being prepared ensures your sailing adventure remains safe and stress-free, no matter where you sail.