Tide Forecast for Block Island (Old Harbor)

Q: What time is high tide at Block Island (Old Harbor) today?

Check the tide table above for today's high tide times at Block Island (Old Harbor). High tides occur when the water level reaches its maximum height. We provide exact times and heights for all high tides throughout the day.

Q: What time is low tide at Block Island (Old Harbor) today?

Today's low tide times for Block Island (Old Harbor) are shown in the tide chart above. Low tide is when the water level is at its lowest point. This information is crucial for beach activities, boat launches, and fishing.

Q: What are the best fishing times at Block Island (Old Harbor)?

The best fishing times are typically during the 2-3 hours around high tide and low tide, especially during major and minor solunar periods. Our fishing quality rating takes into account tide movements, moon phases, and time of day to help you plan the most productive fishing trips.

Q: How do I read the tide chart?

Our tide chart shows the predicted water level throughout the day. High points represent high tides (▲) and low points represent low tides (▼). The height is measured in feet relative to MLLW (Mean Lower Low Water). Times are shown in the local time zone.

Q: What is a tide coefficient?

The tide coefficient indicates the amplitude of the tide compared to average conditions. Values above 70 indicate spring tides (larger tidal range), while values below 50 indicate neap tides (smaller range). Higher coefficients generally mean better fishing conditions.

Detailed tide information to help plan your fishing trips

Block Island (Old Harbor) is a tidal monitoring station situated in the northern coastal waters of Rhode Island, USA. This station provides accurate tide predictions for fishing, boating, surfing, and marine activities. Check our detailed tide charts to plan your trips at optimal tide heights and times.

Today's tidal range at Block Island (Old Harbor) is approximately 3.1 feet, following a mixed tidal pattern. Understanding these tidal movements is crucial for anglers, as fish feeding activity increases significantly during tide changes. The best fishing typically occurs during the first and last hours of each tidal shift.

Our comprehensive tide forecast for Block Island (Old Harbor) includes precise high tide and low tide times, accurate tide heights measured in feet, moon phase analysis, sunrise and sunset times, current weather conditions, and fishing quality ratings based on tidal and lunar factors. All data is updated regularly from NOAA's official tide stations and weather services, ensuring you have the most current information for planning your marine activities.

Weather Conditions

TODAY, MONDAY 17 NOVEMBER 2025

Partly Cloudy

cloud cover 25%

Wind

29 mph

Comes from W (270°)

Temperature

42 °F

Maximum 56° F

Minimum 37° F

Wind chill 34.3° F

Humidity

52 %

Dew point 26° F

Visibility

10.0 mi.

Data Source: NOAA Weather Service • 2025-11-17

Weekly Tide Table

Date	Moon Phase	Sunrise	Sunset	1st Extreme	2nd Extreme	3rd Extreme	4th Extreme	Coefficient	Fishing Rating
1. Mon, November 17 (Today)	🌔 Waxing Gibbous 9.5%	06:36 AM ☀️ (New_York)	04:25 PM 🌙 (New_York)	05:28 AM 3.201 ft ▲	11:48 AM 0.267 ft ▼	05:43 PM 2.556 ft ▲	11:25 PM 0.192 ft ▼	93 Spring	👌 Average Score: 3/5
2. Tue, November 18	🌔 Waxing Gibbous 4.7%	06:37 AM ☀️ (New_York)	04:24 PM 🌙 (New_York)	06:05 AM 3.26 ft ▲	12:24 PM 0.193 ft ▼	06:19 PM 2.584 ft ▲	11:52 PM 0.154 ft ▼	96 Spring	🎣 Excellent Score: 5/5
3. Wed, November 19	🌔 Waxing Gibbous 1.6%	06:38 AM ☀️ (New_York)	04:24 PM 🌙 (New_York)	06:39 AM 3.272 ft ▲	12:58 PM 0.14 ft ▼	06:54 PM 2.599 ft ▲	--	97 Spring	🎣 Excellent Score: 5/5
4. Thu, November 20	🌔 Waxing Gibbous 0.2%	06:39 AM ☀️ (New_York)	04:23 PM 🌙 (New_York)	12:22 AM 0.138 ft ▼	07:12 AM 3.242 ft ▲	01:32 PM 0.125 ft ▼	07:29 PM 2.584 ft ▲	97 Spring	🎣 Excellent Score: 5/5
5. Fri, November 21	🌔 Waxing Gibbous 0.6%	06:40 AM ☀️ (New_York)	04:22 PM 🌙 (New_York)	12:56 AM 0.152 ft ▼	07:45 AM 3.174 ft ▲	02:05 PM 0.158 ft ▼	08:04 PM 2.535 ft ▲	94 Spring	🎣 Excellent Score: 5/5
6. Sat, November 22	🌔 Waxing Gibbous 2.8%	06:42 AM ☀️ (New_York)	04:22 PM 🌙 (New_York)	01:31 AM 0.198 ft ▼	08:19 AM 3.077 ft ▲	02:38 PM 0.236 ft ▼	08:40 PM 2.456 ft ▲	89 Moderate	🎣 Excellent Score: 5/5
7. Sun, November 23	🌔 Waxing Gibbous 6.7%	06:43 AM ☀️ (New_York)	04:21 PM 🌙 (New_York)	02:08 AM 0.272 ft ▼	08:56 AM 2.964 ft ▲	03:12 PM 0.339 ft ▼	09:19 PM 2.364 ft ▲	84 Moderate	👌 Average Score: 3/5
8. Mon, November 24	🌔 Waxing Gibbous 12.2%	06:44 AM ☀️ (New_York)	04:21 PM 🌙 (New_York)	02:46 AM 0.367 ft ▼	09:36 AM 2.847 ft ▲	03:50 PM 0.439 ft ▼	10:03 PM 2.288 ft ▲	77 Moderate	👌 Average Score: 3/5

▲ High Tide

▼ Low Tide

☀️ Sunrise

🌙 Sunset

🌕 Moon Phase

🎣 Fishing Rating (scoring criteria)

Coefficient: Tide amplitude relative to mean (>70 Spring, <50 Neap) (how it's calculated)

Today's Tide Forecast

Understanding Tides and Fishing Conditions

Understanding Tides

Tides are the rise and fall of sea levels caused by gravitational forces from the moon and sun, combined with Earth's rotation. The moon has the strongest influence due to its proximity. As the moon orbits Earth, its gravitational pull creates a bulge of water on the side closest to it, and another on the opposite side, resulting in high tides. Areas in between experience low tides.

Types of Tides

There are three main types of tidal patterns: Semidiurnal tides have two high tides and two low tides of roughly equal height each day. Diurnal tides have one high tide and one low tide per day. Mixed tides feature two high tides and two low tides of different heights. The type of tide depends on the location's geography and position relative to the moon.

How Tide Coefficients Work

The tide coefficient is a numerical value (typically 20-120) that indicates the tidal amplitude compared to average conditions. Coefficients above 70 indicate spring tides - these occur during full and new moons when the sun, moon, and Earth align, creating larger tidal ranges. Coefficients below 50 indicate neap tides - these happen during quarter moons when gravitational forces partially cancel out, resulting in smaller tidal ranges.

Best Tides for Fishing

Many experienced anglers consider the period around tide changes to be prime fishing time. As tides transition from high to low or low to high, water movement increases, bringing nutrients and prey fish into feeding zones. This triggers predatory fish to become more active. The first and last hours of a tide change are often most productive. Combine this with major solunar periods (when the moon is directly overhead or underfoot) for optimal fishing conditions.

How to Read Tide Charts

A tide chart displays predicted water levels over time. The vertical axis shows height (usually in feet) measured from a reference point called MLLW (Mean Lower Low Water). The horizontal axis shows time. High tides are marked with ▲ symbols and low tides with ▼ symbols. The curve between these points shows how quickly the water level changes. Steeper curves indicate faster current speeds, which can affect fishing and boating conditions.

Moon Phases and Fishing

Moon phases influence both tides and fish behavior. New Moon and Full Moon create spring tides with maximum tidal range - often considered the best fishing periods. First Quarter and Last Quarter moons produce neap tides with minimal range. Beyond tides, many anglers believe fish feed more actively during specific lunar phases, particularly during the three days around full and new moons.

Frequently Asked Questions

What time is high tide at Block Island (Old Harbor) today?

Today's high tides at Block Island (Old Harbor) occur at 05:28 AM and 05:43 PM, reaching heights of 3.201 feet and 2.556 feet. These are optimal times for deep-water fishing and boat launching. Plan to arrive 1-2 hours before high tide for the best fishing action.

What time is low tide at Block Island (Old Harbor) today?

Low tides at Block Island (Old Harbor) are at 11:48 AM and 11:25 PM today. Low tide is excellent for beach exploration, tide pool viewing, and accessing areas normally covered by water. Fishing can be productive during the incoming tide following low water.

What are the best fishing times at Block Island (Old Harbor)?

The best fishing times are typically during the 2-3 hours around high tide and low tide, especially during major and minor solunar periods. Our fishing quality rating takes into account tide movements, moon phases, and time of day to help you plan the most productive fishing trips.

How do I read the tide chart?

Our tide chart shows the predicted water level throughout the day. High points represent high tides (▲) and low points represent low tides (▼). The height is measured in feet relative to MLLW (Mean Lower Low Water). Times are shown in the local time zone.

What is a tide coefficient?

The tide coefficient indicates the amplitude of the tide compared to average conditions. Values above 70 indicate spring tides (larger tidal range), while values below 50 indicate neap tides (smaller range). Higher coefficients generally mean better fishing conditions.

How does the moon phase affect tides at Block Island (Old Harbor)?

Moon phases have a significant impact on tidal range. During full moon and new moon, you'll experience spring tides with larger ranges. During quarter moons, neap tides occur with smaller ranges. Many anglers find that fishing is best during the days around full and new moons.

Is this tide data accurate?

Yes, our tide predictions are based on official NOAA data and are highly accurate. However, actual conditions can be affected by weather, wind, and barometric pressure. Always check current weather conditions alongside tide predictions for the most complete picture.

How far in advance can I see tide predictions?

We provide tide forecasts for the next 7 days, including high and low tide times, heights, and fishing quality ratings. This allows you to plan your activities well in advance and choose the best days for fishing or other marine activities.