Vieques, Puerto Rico tide times

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived.

Model-derived from a global ocean grid. Useful indication; expect about ±45 minutes on average vs. a local harmonic gauge, individual stations vary widely. See /methodology for per-region detail. Not for navigation.

Conditions as of 00:00 local time. Refreshes daily.

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived. · Not for navigation.

The angler tradition for major/minor fishing windows: major ≈3-hour windows around moon transit and opposition; minor ≈2-hour windows around moonrise and moonset. Times are America/Puerto Rico local. Folk tradition, not a scientific forecast.

Vieques is a separate island municipality 13 km off Puerto Rico's east coast, 34 km long and 8 km wide, with a history unlike any other Caribbean island. The US Navy used most of the island as a live-fire training range from 1941 until 2003, when sustained civil protests forced a handover. The former bombing range is now managed as the Vieques National Wildlife Refuge by the US Fish and Wildlife Service, and the beaches that were once marked with warning signs — Red Beach, Blue Beach, Green Beach — are now accessible, their remoteness and limited infrastructure preserving a character that the resort strip at Playa el Agua cannot replicate. The tidal regime at Vieques is Caribbean microtidal: spring range 0.3 to 0.5 metres, mixed semidiurnal, with two unequal highs and lows per day. Weather dominates. The northeast trade wind runs roughly parallel to the island's long axis, and the difference between the wind-exposed north coast and the sheltered southern bays is larger than anything the tide produces. Esperanza, the main village on the south coast, sits on a malecón facing a calm bay — protected from the trade wind by the island's ridge, reliably flat except during south swell events that are rare on this coast. Mosquito Bay, on the south coast east of Esperanza, holds one of the world's highest concentrations of Pyrodinium bahamense dinoflagellates — the organisms responsible for bioluminescence. The National Geographic Society has at various times measured it as the world's brightest bioluminescent bay. The bay is shallow, sheltered, and connected to the sea through a narrow mangrove channel that restricts water exchange and keeps the organisms concentrated. Kayaking the bay after dark reveals every paddle stroke in cold blue-green fire and the wakes of small fish as streaks below the surface. The glow is most visible in the darkest parts of the lunar cycle; cloud cover suppresses it further. Electric motorboat tours are banned to protect the bay ecosystem; only non-motorised and electric kayaks are permitted. Red Beach and Blue Beach on the former Navy range's eastern sector are reached by a dirt road through the refuge. Red Beach is a long, wide crescent of rust-colored sand facing southeast — exposed enough to catch occasional Atlantic swell from the east but usually calm in the prevailing trade. Blue Beach, also called Caracas Beach, is longer, backed by low vegetation, and fronts a bay that is broadly sheltered. Access requires a 4WD vehicle or a high-clearance rental; the unpaved road deteriorates after rain. Beach facilities are minimal — no food vendors, no lifeguard, no shade structures — which keeps the crowds thin on weekdays. Anglers on Vieques target bonefish on the shallow flats of the south coast — the flats between Esperanza and La Hueca are walkable on the lower half of the tide, when the water drops below 0.5 m above the lowest astronomical tide. Bonefish move onto the flat on the flood and retreat to the channel edges on the ebb; the predictable 0.3 to 0.5 m tide range here is small enough that the fishing window opens and closes slowly. Tarpon hold in the mangrove channels year-round. Offshore, the Puerto Rico Trench drop-off northeast of the island produces mahi-mahi and wahoo in the rip current zone where the shelf edge meets deep water. Families visiting Esperanza find the village malecón, the adjacent beach, and the calm bay immediately accessible — calm water, small boat traffic, and a gentle entry. The tide range barely changes the character of the beach. Sun Dreamer and other guesthouses line the malecón; the village has a few restaurants, a small grocery, and the ferry terminal connecting to Fajardo. The ferry runs several times daily but demand is high and reservations fill quickly. Photographers targeting Mosquito Bay for night shots face the additional challenge of not being able to use bright lights in the bay (they suppress the organisms). Phone cameras in night mode, mounted on a float, produce passable results; long-exposure DSLR shots from a kayak are difficult but achievable in the calm conditions the bay provides. The predicted tide on the nights of interest is available on this page; for the bay's shallow channel, the difference between predicted high and low is under 0.4 m and the channel remains paddleable throughout. Predictions on this page come from Open-Meteo Marine, a global gridded ocean model. Typical accuracy is ±45 minutes on timing and ±0.2 to 0.3 metres on height. Given Vieques's spring range of 0.3 to 0.5 m, the model uncertainty is a significant fraction of the total signal. For activity-critical planning, cross-reference with NOAA Puerto Rico harmonic predictions.