St Kitts and Nevis Weather Forecast

This detailed weather forecast, valid until 8 pm on Monday, May 12, 2025, predicts partly cloudy conditions with a moderate chance of brief showers for the next 24 hours. The forecast area is currently under the influence of a strong Atlantic High Pressure system, a typical weather pattern for this time of year. This high-pressure system generates a consistent trade wind flow, which is expected to be moderate to fresh, transporting moisture from the Atlantic across the islands. This moisture, combined with the atmospheric dynamics associated with the high-pressure system, creates an environment conducive to the development of shallow, transient pockets of clouds and the possibility of brief, passing showers. These showers are not expected to be widespread or long-lasting but are likely to occur sporadically throughout the forecast period.

The forecast for tonight anticipates fair to partly cloudy skies with intermittent cloudy spells. There is a 60% chance, classified as moderate, of brief passing showers occurring overnight. These showers are expected to be short in duration and relatively light. Similarly, the forecast for tomorrow predicts partly cloudy skies with brief cloudy spells and a similar 60% chance of brief passing showers, primarily occurring in the morning. The overall picture is one of relatively stable weather conditions dominated by the high-pressure system, with the occasional interruption of brief showers. This pattern is typical of trade wind weather, where moist air is transported across the islands, leading to localized and transient shower activity.

The wind conditions are expected to be consistent with the trade wind flow, blowing from the East at speeds of 19 to 33 km/h (12 to 21 mph). Higher gusts of up to 46 km/h (29 mph) are possible, particularly during shower activity, over open waters, and in elevated areas. These higher wind speeds are a result of the pressure gradient associated with the high-pressure system and the added influence of localized downdrafts from shower clouds. Mariners and those engaged in activities over open waters or at higher elevations should be aware of these potentially stronger gusts.

Sea conditions are forecast to be moderately rough, with wave heights ranging from 1.5 to 2.1 meters (5 to 7 feet). These conditions, while not particularly extreme, warrant caution for small craft operators. The combination of moderate wave heights and the potential for gusty winds could create challenging conditions for smaller vessels. Small craft operators are advised to exercise caution and stay informed about changing weather conditions. Larger vessels are unlikely to be significantly impacted by these sea conditions but should still be mindful of the potential for localized stronger gusts associated with shower activity.

The dominance of the high-pressure system suggests a relatively stable atmospheric environment. The trade winds, while bringing moisture, are not expected to generate widespread or intense rainfall. The brief, passing showers are characteristic of this type of weather pattern, where pockets of moisture condense and precipitate quickly before being carried away by the wind. The overall outlook is for relatively pleasant conditions, with temperatures reaching a high of 32°C (90°F) and a low of 23°C (73°F). This moderate temperature range, combined with the trade winds, should provide comfortable conditions despite the chance of occasional showers.

In summary, the forecast period will be characterized by partly cloudy skies, a moderate chance of brief passing showers, and consistent trade winds. Temperatures will be moderate, ranging from 23°C (73°F) to 32°C (90°F). Sea conditions are expected to be moderately rough, advising caution for small craft operators. The dominant influence of the Atlantic High Pressure system ensures relatively stable weather with the characteristic trade wind pattern bringing intermittent showers. The sunrise is predicted at 5:40 am and sunset at 6:34 pm, providing ample daylight hours. The overall forecast indicates generally pleasant weather conditions with the occasional interruption of brief showers, typical of trade wind influenced weather patterns.