Why Costa Fishing Sunglasses Are Trusted by Serious Anglers

Polarised fishing sunglasses are one of the most important pieces of equipment any serious angler can own. More than simple eye protection, the right lenses allow you to cut through surface glare, improve contrast and spot fish that would otherwise remain invisible. 

Costa fishing sunglasses have built a reputation among professional guides and travelling anglers worldwide for their exceptional clarity, durability and lens technology. We pitched some of the questions we regularly get asked about these glasses to an expert at Costa. In this guide, we answer those questions, explain what makes Costa sunglasses different and why they have become the preferred choice for demanding saltwater/freshwater environments alike.

Why Polarised Sunglasses Are Essential for Fishing

Light reflecting off the water creates horizontal glare that prevents you from seeing beneath the surface. Costa’s polarised lenses are designed to filter this reflected light, dramatically improving visibility and reducing eye fatigue. This allows anglers to spot fish, structure and movement far more effectively - whether sight fishing on tropical flats, tracking predators in clear water or reading river currents.

Costa’s 580® lens technology enhances contrast by filtering harsh yellow light and managing blue light transmission, helping colours appear sharper and more defined.

This makes a measurable difference when scanning water for subtle movement or distinguishing fish against complex backgrounds.

Selecting the Best Costa Sunglasses for Fishing

Why do I need specialist Sunglasses for my Saltwater Fishing?

The main differences between salt and freshwater conditions are the light conditions you will encounter and how the water surface reflects light back at you. When you’re out on the ocean surrounded by many acres of bright blue water and a blue horizon you need to block the greatest amount of reflective glare coming from the water possible. This is both for your comfort and to minimize the effects of harmful rays entering your eyes.

A dark coloured lens such as blue or green mirror will maintain and enhance colour saturation and natural contrast, while offering maximum light protection in these conditions.

And freshwater?

In fresh water, you might be in and out of shade cover, staring into brown or green murky water, and you need more light to see the fish clearly. A copper lens is going to provide slightly more light than a darker lens. A specialty sunrise (silver mirror) lens is going to let the maximum amount of light in - this is ideal for early morning or late afternoon fishing.

Which Costa lenses would you recommend for fresh water?

Because freshwater fishing often involves peering into murky, dark water, perhaps in and out of shade cover from the trees, you need as much light as possible to see the fish more clearly. A copper-based lens allows more light to enter your eye, while Costa’s 580™ lens technology creates razor sharp colour enhancement, so anglers can make out the shapes under the water more clearly.

Is there a difference between stillwater and moving water visually?

It’s not so much the water as the light. Are the conditions sunny or overcast? Is the water crystal clear blue or brackish brown? You might spot fish easier in clear, moving water, but have a more difficult time in cloudy, still water. It really depends on the conditions, and the performance quality of your lens. You want something like a Costa 580 lens that’s going to enhance visual acuity.

Choosing the Right Costa Lens Colour

Different lens colours perform best in different light conditions:

Silver Sunrise Mirror

Extended wear lens. The perfect tool for dusk and dawn performance.

• 25% light transmission

• Activities during sunrise/sunset
• Heightened contrast
• Low light/overcast conditions

Copper Silver Mirror

Well-suited for stream fishing and other environments with varying light.

• Copper Base
• 12% light transmission

• Excellent for sight fishing
• Everyday activities
• Most versatile
• Cloudy days

Green Mirror

Ideal for general fishing use in a wide range of light conditions. Excellent contrast and glare reduction for flats, inshore and freshwater fishing.

• Copper Base
• 10% light transmission

• Sight fishing in full sun
• High contrast

Copper

Cuts glare for eye comfort in a variety of situations, from sight fishing to driving. Excellent for lower light conditions and freshwater fishing, enhancing contrast in rivers and lakes.

• 12% light transmission

• Excellent for sight fishing
• Everyday activities
• Most versatile
• Cloudy days

Grey Silver Mirror

A good everyday choice for activities on the water and land.

• Gray Base
• 10% light transmission

• Everyday activities
• Anti-fatigue
• Overcast days
• Reduces glare, especially off water

Grey

Provides natural colour balance and is ideal for bright, direct sunlight. A good everyday choice for activities on the water and land.

• 12% light transmission

• All-around activities
• Natural contrast

Blue Mirror

Best suited to bright offshore environments with intense sunlight and open water.

• Gray Base
• 10% light transmission

• Boating and fishing in deep water
• Open reflective water
• Harsh sun

When I’m fishing in saltwater, what are the main lens considerations, performance wise?

Salt is one of the most corrosive materials out there, and can be really abrasive on your sunglass lenses. From a performance standpoint, you want a hard coated, scratch resistant, 100 percent polarized lens able to withstand the elements, while allowing you to see more clearly.

Costa sunglasses are 100% polarized, blocking reflected glare from surfaces like water and windshields. This reduces eyestrain and enables wearers to see beneath the surface of water.

Costa’s 580 patented technology goes beyond 100% UV protection and 100% polarization to produce the clearest sunglass lenses on the planet. The lenses selectively filter harsh yellow and harmful high-energy blue light. Wearers immediately notice that colours (especially reds, blues and greens) are brighter and much clearer. Objects appear more defined. So much so that many describe Costa's 580 technology as comparable to when seeing high-definition TV for the first time.

Can you describe how different lenses work with angling in shallow water vs. deep sea fishing?

When trolling we follow the general rules mentioned previously with lens colour choices and your water environment. These rules change when it comes with sight fishing, which involves being able to see fish in any water environment and present them with your fly, lure or bait. In these situations we recommend a copper-based lens for the absolute highest level of differentiation with minute detail below the water’s surface.

What’s the most dramatic technological development to help anglers see better?

Undoubtedly, Costa’s colour-enhancing 580™ lens is the most revolutionary lens technology developed to help anglers spot fish in the water more clearly. By cutting the yellow light, the other colours - reds, blues, greens - become sharper and more vivid. Anglers can spot fish in the water faster and more clearly as a result.

Is there a good all-around fishing lens for anyone that loves to be on or near the water, whether it be a lake, river, beach or ocean?

A polarized lens with 580 colour enhancing technology will provide the clearest vision for driving and other everyday activities. If someone isn’t specific about their fishing condition, lens colour choices sometimes do come down to personal preference.

Glass vs Polycarbonate Lenses

Costa offers both glass and polycarbonate lenses, each with advantages:

Glass lenses offer the highest optical clarity and superior scratch resistance, making them ideal for anglers who demand maximum visual performance.

Polycarbonate lenses are lighter and more impact-resistant, making them better suited to active fishing situations where weight and durability are priorities.

Why Serious Anglers Choose Costa

Costa fishing sunglasses have earned their reputation through decades of real-world use in some of the most demanding environments on the planet. Their advanced polarised lens technology, exceptional clarity and durable construction provide anglers with a genuine advantage on the water.

Whether stalking bonefish on tropical flats, casting to GTs over coral reefs or fishing rivers closer to home, clear vision is critical - Costa sunglasses consistently deliver the performance required when it matters most and are an essential part of your tropical fishing clothing setup.