Meteorological Service Suriname | Ministry of Public Works and Spatial Planning
National Meteorological Centre | J.A. Pengel International Airport
National Meteorological Centre | J.A. Pengel International Airport
WEATHER BULLETIN FOR SHIPS
SURINAME COAST & THE GUIANAS | 05N–15N / 45W–60W
🚨 PART I: STORM WARNING
NO STORM WARNING. No storm warning is currently active for the forecast area.
🌐 PART II: SYNOPTIC OVERVIEW — Situation 1200UTC, July 19, 2026
A subtropical ridge centered near 29.5N/57W continues to support an easterly trade-wind regime across the forecast area, with the strongest winds and seas analyzed between 52W and the Lesser Antilles. A tropical wave near 53W is moving west at about 20 kt and is expected to lie near or just west of the 55W–60W sector by the start of the period, with its deepest moisture and convection focused mainly south of 10°N. The ITCZ remains active near 07°N–08°N over the eastern part of the domain, keeping the southern offshore belt and Guianas coastal waters the most unsettled. No storm warning applies to the forecast box, and no tropical cyclone development is expected in the near term.
🌧 Saharan Dust: Current guidance shows no notable Saharan dust intrusion affecting this forecast area during the period. Convective development is being driven mainly by the tropical wave near 53W and the nearby ITCZ; the southern belt (south of 10°N) and the Guianas coastal zone carry the best shower and thunderstorm signal, while the northern half of the box remains more trade-wind dominated with less organized activity.
⛵ PART III: WEATHER FORECAST — 1200UTC July 19, 2026 to 1200UTC July 20, 2026
The marine area is divided by 10°N. North of 10°N, especially over the 55W–60W Atlantic exposures, E–NE trade winds should average 15–20 kt early in the period, easing to 10–15 kt late as the tropical wave shifts west. South of 10°N, near the ITCZ, winds should average 10–15 kt but may briefly reach 15–20 kt in the stronger convective corridor. Seas will be moderate over most of the box, with the roughest conditions early in the 55W–60W sector and north of about 09°N. No storm or gale warnings are in effect for the box, and tropical cyclone formation is not expected in the near term.
💨 Wind
Northern Zone (N of 10N, offshore, esp. 55W–60W): E–NE, 28–37 km/h (15–20 kt, Bft 4–5) early, easing to 19–28 km/h (10–15 kt) late, locally touching Bft 6 in the exposed western/northwestern sector early | Southern Zone (S of 10N, near ITCZ): E–NE, 19–28 km/h (10–15 kt, Bft 3–4), briefly 28–37 km/h (15–20 kt) in the stronger convective corridor, with gusts to 52–56 km/h (28–30 kt) near active shower and thunderstorm cells
👁 Visibility
Northern Zone: good to very good outside precipitation, generally above 10 km (5+ nm), locally reduced in showers | Southern Zone: excellent outside precipitation (10+ km / 5+ nm), dropping to 4–8 km in moderate showers and 1–3 km in heavier thundershowers/squalls, especially early in the period
🌊 Waves N of 08N
Northern Zone (N of 10N), esp. 55W–60W: E–NE, 1.8–2.4 m, isolated patches near 2.5–3.0 m early in the period | Southern Zone (S of 10N): E–NE, 1.5–2.1 m, decreasing to 1.2–1.8 m late
🌀 Swell
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🌊 MARINE FORECAST SURINAME COAST — South of 08N
☀️ DAYTIME | JULY 19, 2026
💨Wind DirectionNE to E
🌬Wind Speed19–28 km/h (10–15 kt), locally 28–37 km/h (15–20 kt) over exposed Atlantic waters and the western coastal box early in the day, gusts mostly 33–44 km/h (18–24 kt), briefly 46–56 km/h (25–30 kt) near showers or thunderstorms (Beaufort scale 3–4, briefly 6)
🌊Wave DirectionENE to E
📏Wave Height1.2–1.8 m (4–6 ft), locally around 2.0 m in the more exposed outer coastal waters
👁VisibilityMostly good | Temporarily reduced to 3–6 km in showers, briefly 1–3 km in heavier convection
⛅WeatherPartly cloudy to mostly cloudy with scattered showers and isolated thunderstorms, with the greatest risk near and just offshore of Suriname, Guyana, and adjacent western sections as tropical wave moisture shifts through.
🌙 EVENING / NIGHT | JULY 19/20, 2026
💨Wind DirectionENE to E
🌬Wind Speed19–28 km/h (10–15 kt), a few exposed segments 28–37 km/h (15–20 kt) early in the night before easing; gusts mostly 33–41 km/h (18–22 kt, Beaufort 5), isolated higher gusts possible in residual showers
🌊Wave DirectionE, easterly swell component persisting
📏Wave HeightSlowly subsiding to about 1.2–1.8 m, locally near 2.0 m offshore
👁VisibilityGood outside showers, locally reduced in rain
🌙WeatherShower coverage trending from scattered to isolated or scattered later at night, though a few thunderstorms may linger early — especially in the western coastal waters as the wave exits toward the west.
🔭 OUTLOOK — Suriname Coast, July 20 to July 23, 2026
⛅ Weather💨 Wind
💨 WindMon–Tue Jul 20–21: E, 10–15 kt (19–28 km/h) | Tue–Wed Jul 21–22: E, 10–15 kt (19–28 km/h), lighter gradient | Wed–Thu Jul 22–23: E, 10–15 kt (19–28 km/h), locally 15–20 kt (28–37 km/h) in exposed waters
🌊 WavesMon–Tue Jul 20–21: 1.2–2.0 m (4–7 ft) | Tue–Wed Jul 21–22: 0.9–1.8 m (3–6 ft) | Wed–Thu Jul 22–23: rebuilding to 1.2–2.0 m (4–7 ft), persistent E swell
Prepared by: Rajai D., Meteorologist
mds@hydromet.sr | 325206 / 325190
mds@hydromet.sr | 325206 / 325190
www.hydromet.sr
MARINE WEATHER KEY ASPECTS
