SiriusXM Fish Mapping

Fish Mapping is SiriusXM Marine's most comprehensive package that delivers fishing data and weather service to your boat's display. Serious anglers use every advantage available and SiriusXM marks the spots where bait fish gather and game fish hunt.



The first thing all smart mariners and anglers do before leaving the dock is check the weather. Continuing to check it throughout the day is also wise. It’s easy with SiriusXM Marine, with the information and maps appearing on the console MFD.

Brief Summary

SiriusXM Marine is a satellite-based service providing weather and fish information available by monthly subscription, providing in-depth, detailed observations and forecasts of conditions both inshore and offshore, updated regularly throughout the day to give the most up-to-date and accurate information available. It’s available across the continental United States, southern Canada and coastal regions, up to 150 NM offshore. It also covers Cuba and most of Mexico.


Captain Steve Larivee does a complete walk-through of the SiriusXM Marine Fish Mapping system here—see the details.

The Fish Mapping plan adds amazing satellite-based data to locate high-success areas for bluewater trolling and live baiting for billfish, tuna and other pelagic species. 

SiriusXM Marine is compatible with Garmin, Furuno, Raymarine and Simrad MFDs. It is not cell phone dependent.  


With two or more large MFDs on the console most offshore boats have plenty of screen space to make weather and Fish Mapping part of their regimen.

Major Features

Timely Weather Information

The weather reporting feature of SiriusXM Marine puts all the latest satellite-based weather information right on your console multi-function display, available by tapping a few virtual buttons. 


Here’s a NOAA lightning map, one of many features available through SiriusXM Marine. The bright spots indicate a storm over land in the southeast, but a clear Gulf of Mexico. (NOAA)

Key Weather Features

  • Weather info readily available on MFDs
  • Most current weather/lightning info available
  • Both Observed and Forecast weather instantly available on screen
  • Satellite-based info available up to 150 nautical miles offshore
  • Wind speed and direction instantly available
  • Wave height and period instantly available for coverage zone


Current information including a wind check every 20 minutes and precipitation check every 4 to 5 minutes at any spot in the coverage area are major features of the SiriusXM Marine Weather system.

Key Fish Mapping Features

  • Find Your Target Species Quickly
  • Find Floating Weed Lines
  • View Sea Surface Altimetry
  • See Water Temperature Contours
  • View 30 M Water Temperatures
  • See plankton concentrations

The SiriusXM Marine Weather and Fish Mapping service is a highly useful, easy-to-operate system that allows receiving up-to-the-minute satellite information on your boat’s multi-function displays, putting the data at your fingertips in a large, easy-to-view format.


In-depth weather data is available at the touch of an MFD screen with SiriusXM Marine Weather subscriptions. (Fleming Yachts)

Weather Data

SiriusXM Marine Weather users can call up marine weather for their exact location, as well as for offshore locations they intend to visit on any given day, right on their MFD at the touch of a few virtual buttons.

A wind-speed button shows wind direction and speed, and the highs and lows where the wind is coming from or running to. And you can look at the forecast for the future—the weekend perhaps. 


Breaking waves on shore are an obvious indication of likely rough water offshore, but with the Sirius-XM Marine Weather service, wave height and period can be viewed for any point in the coverage area.

Sea Conditions

Wave heights are also included. Not only the heights and the direction the waves moving are included, but also their “period” or frequency, a good indication of how rough or smooth the water is likely to be at a given location offshore or inshore.


While most recreational boaters wouldn’t leave the docks to challenge seas like this, the Sirius-XM Marine service can make it easier to know what to expect far offshore on any given day. (Wikimedia)

Specific buoys and weather stations can be called up for the immediate readings of wind and waves at those locations. 

Tap the screen and you’ll see the most localized forecast for that specific area of the coast or offshore. Separate packages are available for inland waters only and for coastal/offshore waters.

Fish Mapping Features


The wheelhouse of a big sportfisher always includes multiple MFDs. These days at least one screen is often dedicated to fishing systems like Sirius-XM Marine's Fish Mapping. (Viking)


SiriusXM Marine's Fish Mapping offers a service that combines all the oceanographic conditions that have been shown to attract specific types of gamefish to simplify the fish-finding process. 

Go into the menu and tap “Billfish” and all the areas within the zone you set where prime conditions of water temperature, currents, weed lines and upwellings are right for Billfish will be displayed. Tap “Bluefins” and similarly, conditions best for the giant tuna are programmed in automatically and prime spots are highlighted.

Of course, many seasoned skippers prefer to make their own calculations on where fishing will be best, and the separate parameters can also be viewed with the system. 

The recommended areas are overlaid on the chart and can be viewed in combination with any of the other Fish Mapping features. The information is updated twice per week, on Tuesday and Friday mornings.


Sargassam weed lines often form along current rips, where water of different temperature or salinity meet. These are prime trolling areas for big game fish. (NOAA)

What Fish Mapping Shows

  • Floating Weed Lines. Floating algae/plants provide nutrients and cover, creating habitats for bait fish, shrimp, etc., and attract larger, predatory game fish. Weed lines drift and shift over time, so they can be hard to locate. Use this feature to help find where weed lines have been sighted recently, or are most likely to be forming — to help you find game fish.
  • Sea Surface Altimetry. View locations where the sea surface height is different than the surrounding area. The anomalies in the sea height show where fronts, eddies, upwellings and downwellings are located. This information can help identify convergence zones including nutrient-rich water that attracts bait fish and game fish.
  • It also identifies "downwelling" areas to avoid, which are nutrient poor areas and don't support favorable fishing conditions. 
  • Water Temperature Contour Lines. Simplified contour lines quickly show the water temperatures in any selected area. Use these contours to help locate target species based on their preferred temperature range. Areas with notable water temperature changes are sometime an indication of strong current flows, which often means good fishing.
  • 30 M Subsurface Sea Temperature. With contour lines for the water temperature 30 meters down, it’s easier to find subsurface roamers like bluefin tuna and wahoo. 
  • Plankton Concentration Contours. Areas with lots of plankton often have lots of baitfish. The contours where these zones meet other desirable conditions can be hotspots.


Big outboard-powered fishing machines like this Contender can get offshore fast and satellite fish mapping services allow them to head to highly productive areas without a lot of fruitless searching. (Contender)

Why Offshore Anglers Need Satellite Data

Time, distance, fuel range and fuel costs are always part of the equation when anglers and charter skippers plan a trip offshore. It often takes hours to get to prime fishing waters, and taking a direct route to the most productive areas is essential to maximize time with baits in front of gamefish. 

Missing a prime area by even a half-mile can be the difference between success and failure. 

And every trip is a crap shoot without the type of accurate and timely information only satellite feeds can provide. 


Pelagic roamers like mahi or dolphin-fish often run weed lines far offshore and finding these lines is made much easier with Sirius-XM's Fish Mapping services.

Satellite Data Saves Cash

In fact, the capability to run directly to a high-success area can save enough money in a single trip to pay for a satellite data service many times over. At 1 mpg, a common fuel consumption for multi-outboard offshore fishing boats, running 25 miles to an unproductive spot means 25 gallons times $5 at the fuel pump — $125 wasted.

Sirius XM Marine's Fish Mapping, which includes all their weather information and eight dedicated fishing features, cost just $109.99 a month, so the cost is made up if the captain avoids just one unproductive detour like this.

And for anglers who stay out multiple days in boats with overnight capabilities, the changing conditions can be followed precisely—by tomorrow morning, the fish likely won’t be where they were today. 

It also allows finding the clear blue water and the edges, the altimetry or upwellings/down-wellings, current flow and edges where currents meet, where there are frequently weedlines.

Anglers' fish structure or bottom changes and where there is structure and also a current or temperature break, that’s a high success area.

No More Airplane Surveys


Tournament anglers who used to hire airplanes to fly over the fishing areas to visually pick out rips, weed lines and color changes no longer have that investment of time and money. Satellite data is always on call, immediate and up to date, and much more comprehensive than anything a small plane pilot can bring home.

Seasonal Changes

There’s frequently a sharp temperature break from inshore water to offshore water in late fall, winter and early spring and the break will form rips where weedlines appear—and gamefish feed. The system points out these areas right on your MFD.


When currents and upwellings are found near structure like oil rigs, fishing can be particularly productive. (Encore Boats)

Structure and Currents

Where an upwelling or a rip flows over a bottom feature—or around an oil rig—fishing can be particularly productive. 

The same is true for Fish Attracting Devices or FADS, placed offshore for the benefit of recreational anglers. 


Fish attracting devices or FAD’s nearly always hold bait. If conditions of water temperature, currents and water clarity are right, they’re also likely to attract gamefish. (NOAA)


Blue marlin are particularly likely to show where current, water clarity and upwellings converge. (South Carolina Billfish Classic)

Options to Consider

You can subscribe for only as much satellite service as you actually need thanks to multiple plans available from Sirius XM. 

Non-anglers save money by opting for the weather service only. 

The Inland monthly service is just $17.99 per month, covering all areas of the U.S. and Canada that are not on the coast. The service includes detailed weather radar and lightening detection.

The Coastal service is $37.99 including weather radar, lightning detection and wind and wave data.


Click on any spot in the coverage area and you get an immediate water temperature readout.

Serious bluewater anglers will probably want more and lots more is available.  

The Offshore plan is $64.99, including all of the above plus offshore sea surface temperatures — a big plus for big game anglers.

The maximum plan, Fish Mapping, is $109.99 and includes all of the offshore weather information plus 8 amazingly detailed fishing features. 

You’ll probably want to add the Sirius XM Platinum plan for music, news and sports as well, allowing you to keep up with your favorite teams even while out fishing on weekends. The Platinum plan includes ad-free music from every genre and every era as well as complete coverage of football, basketball, baseball, hockey and other sports from every major professional team as well as NCAA teams.  It’s free for three months, then just an added $18.99 per month. See details at


Considering the moderate cost of Sirius XM Marine Fish Mapping it’s likely that most anglers who regularly run offshore in pursuit of big gamefish can benefit from the service. The benefits not only include catching more fish, but also making better use of the available time on the water, and saving significantly on fuel use by running directly to high-success areas rather than trolling aimlessly in hopes of hitting a hotspot. And when you stop using your boat for the season in northern locations, you can suspend the subscription for up to six months per year, renewing in spring when you launch once again without paying an activation fee.