The Tempoross is a boss that can be fought with skills rather than combat; it can also be played alone or with other players and has a points system, making the gameplay similar to that of the Wintertodt.
The tempoross is quite simple and interesting to do. During the game, you are supposed to catch fish on an island and then use them as ammunition for a cannon that would be shot at Tempoross to weaken it. Tempoross can use several attacks on you, but you do not have to worry about dying; Tempoross's attacks have no effect on your hitpoints, but you will lose your supplies if you get hit.
In this guide, I will show you how to do Tempoross efficiently to get the best rewards and experience rates.
To fight Tempoross, you only need 35+ fishing, and its location is easily accessible to all players.
Rope: This is used to tether yourself to the totem pole or mast when there is an incoming colossal wave.
Buckets: They can be filled with water using the water pump, and then the bucket of water can be used to extinguish the fire in the clouds. You should bring about 5 buckets per round to be able to put out any fires that arise.
Harpoon: When doing tempoross, this is very important because it is used to capture the fish that would be shot at Tempoross through the cannon.
Hammer: This is used to repair Totem or Masts when they get damaged.
Small fishing net: This is used for searching for rewards gotten from doing tempoross.
Anglers' outfit: This outfit increases your experience rate when training at Tempoross by 2.5%.
Crystal Harpoon: This is the best harpoon available in Oldschool Runescape. Using this would significantly improve your experience rates when fighting Tempoross.
Before you start, install the Tempoross Plugin on RuneLite.
It highlights:
This makes tracking attacks and efficiency much easier, especially when doing Solo Tempoross Strategy.
There are several ways to get to Tempoross; here is a list of the quickest:
United Kingdom (W341), United States west (W422), Germany (463)
To start a game, you need to head to the boat in the Ruins of Unkah, make sure you have the inventory setup as discussed above, and you can find those items at the edges of the boat, as shown below.
Board the boat and wait for the countdown announced by Captain Dudi on the boat, after which the boat will sail to the island where the Tempoross can be found, nd but if the boat reaches its maximum capacity before the countdown is complete, you'd be whisked away to the island right away.
Tempoross, like Wintertodt, can be fought alone or in a group. Fighting the tempoross solo is not difficult once you've learned the game, but if you're a beginner, I recommend using the official worlds to get a basic understanding before going solo.
When you are transported to The Island, also known as Pirate's Cove, you will be on one of two opposing boats; the one you spawn on makes no difference, as they both lead to the island, as shown in the image below.
The Tempoross energy bar can be found on the top left part of your screen, as shown below. The more cannons shoot the harpoon, the fish you and other players have used as ammunition at the boss, the weaker it becomes and the less energy it has.
Harpoonfishes are used as ammunition for cannons found on the ship's deck. There are several fishing spots found around the island's edges, as shown below; you can load the Harpoon fish directly or cook it to deal more damage and gain more points, resulting in more rewards.
The double fishing spot appears occasionally, the first mate Peri there will say “More Fish“ when the fishing spot appears, Fishes will jump out of the double fishing spot and if you have runelite, the fishing spot will turn green and other players will run to this spot, you should keep an eye out for it and fish from there anytime you see it. 
The tempoross has two phases, and the first phase requires you to fish for Harpoonfish and then use it as ammunition for the cannon to shoot the tempoross, which will drain its energy until it reaches zero.
When the tempoross energy reaches zero, the tempoross will return to the water, and the second phase begins. You must run to the harbour shown below to drain the essence of tempoross by fishing at the spirit pool shown below. The Tempoross essence bar is depicted above, starting at 100% and decreasing to zero as you and other players begin to drain it.
After the essence has been depleted, the tempoross's energy will return to 100%, it will emerge from the water, and you will need to return to the fishing harpoon for fish and then use them as ammunition for the cannon (phase 1). In most games, you must complete these two phases twice to be successful during that round. While performing these steps, keep an eye out for the random attacks that tempoross is known for.
Throughout each round, the Tempoross will launch various attacks to thwart your attempts to weaken him. All of these attacks do not reduce your hitpoints and are easily avoidable, but if you do not dodge the attacks, you will lose some of the following items: a Hammer, A bucket of water, as well as a bucket of both raw and cooked harpoonfish if they are in your inventory.
Occasionally, multiple clouds will hover around the island and the boats, striking the tile beneath them and causing it to burn. You should always avoid these fires because if you get caught in one, you will lose your items, as discussed above.
You can douse out the fires using a bucket of water. If you are in the official worlds and do not bring a bucket of water, you must wait for other players to douse the fires, which happens fairly frequently.
During the first phase of tempoross, a large wave would sweep across the island; there are three warning signs that this is about to happen.
Before the weather turns very blue, or as soon as you see any of these indicators, run to the totem if you're on the island, or to the mast if you're on the boat, and click it to tether yourself to it; this will only work if you have a rope in your inventory. As the wave grows stronger, you won't be able to see your character clearly because the screen will be mostly obscured.
After a while, the wave will pass, and you will be able to resume your normal activities. If you do not tether yourself to the totem in time, you will be knocked to the ground and lose some of your items.
The Totem pole can be found near the fishing and cooking spots in Tempoross Cove. The Totem pole has a 15% to 25% chance of breaking after a wave sweeps over it, so you must repair it with a hammer whenever it breaks to prepare for the colossal wave. You will gain construction experience equal to four times your current construction level.
Masts function similarly to totem poles in that they have a 15% to 25% chance of breaking when a wave sweeps over them, and you receive four times your current construction level whenever you repair them.
You must exercise caution when attacking Tempoross with any of the cannons because he will randomly strike them with a swirling pillar of water, electrifying them and rendering them inoperable during this time. If you were using the cannon at the time he struck it, you would be electrocuted, stunned, and lose some of your items.
When fighting tempoross, your points should increase whenever you perform different activities within the game; here is a list of the activities and the number of points each one provides:
Fishing: Fishing for Harpoon fish offers 5 reward points.
Cooking: Cooking the Harpoonfish offers 10 reward points.
Depositing Harpoonfish: Anytime you deposit raw harpoon, you get 20 points; if you deposit cooked harpoon, you get 65 points.
Dousing fires: Any time you douse the fires caused by the clouds, you get 40 points.
Surviving the Colossal wave: If you can tether to the Totem pole or Mast in time and survive the wave without getting knocked down, then you will be given 10 points.
Harpooning spirit pool: During the second phase of Tempoross, you would be able to get the fastest points in the Tempoross game by harpooning the spirit pool. You will be given 55 points per scatter as you fish in the Spirit pool.
These points are used to calculate the number of permits you will receive to search the reward pool. When you get 2000 points, you get one permit; after that, for every 700 points you get another permit, so 2700 is two permits, 3400 is three permits, 4100 is four permits, and so on.
You must collect as many points and experience as possible during the round because none will be added at the end. After completing one round, you will need a small fishing net to fish near the dock to receive your rewards using the permits you obtained during the round.
Different methods to play Tempoross
There are 2 methods I’m going to describe; if you are looking to get more experience per hour or more points, that will determine the method you should follow.
How to get the most points while playing tempoross
If you'd like to check out the Tempoross Solo guide, you can find it here; it has more detailed information on how to get the most permits per round.
To get the highest experience rates, don’t cook at all during the rounds. You should use the double fishing spots and follow the other steps described above. Using this method would be able to get only 2 -3 permits per game.
At 35 fishing, players can get 30,000 fishing experience per hour or 22,000 when cooking.
At 70 fishing, players can get 62,000 fishing experience per hour or 52,000 when cooking.
At 80 fishing, players can get 65,000 fishing experience per hour or 56,000 when cooking.
At 90 fishing, players can get 68,000 fishing experience per hour or 60,000 when cooking.
At 99 fishing, players can get 74,000 fishing experience per hour or 66,000 when cooking.
At 70 fishing, players can get 66,000 fishing experience per hour or 54,000 when cooking.
At 80 fishing, players can get 69,000 fishing experience per hour or 58,000 when cooking.
At 90 fishing, players can get 72,000 fishing experience per hour or 62,000 when cooking.
At 99 fishing, players can get 74,000 fishing experience per hour or 66,000 when cooking.
At 70 fishing, players can get 72,000 fishing experience per hour or 58,000 when cooking.
At 80 fishing, players can get 77,000 fishing experience per hour or 62,000 when cooking.
At 90 fishing, players can get 80,000 fishing experience per hour or 66,000 when cooking.
At 99 fishing, players can get 92,000 fishing experience per hour or 70,000 when cooking.
To claim your rewards in Tempoross, you need to use a small fishing net in the Reward Pool located a few steps south of Tempoross Bay.
You can store up to 8,000 permits before collecting rewards from the Reward Pool.
Unique
Big harpoonfish (1/1,600)
Tome of water (empty) (1/1,600)
Tiny tempor (1/8,000)
Dragon harpoon (1/8,000)
Spirit flakes ×32–64 (1/4), Casket (Reward pool) (1/20), Soaked page ×5–9 (1/53.69), Fish barrel (1/400), Soaked page ×25 (1/400), Tackle box (1/400)
Fish (Levels 35–39)
Raw herring ×30–40 (noted) (1/7.111), Raw mackerel ×20–30 (noted) (1/7.901), Raw pike ×10–20 (noted) (1/8.889), Raw salmon ×7–12 (noted) (1/10.16), Raw tuna ×5–10 (noted) (1/11.85)
Fish (Levels 40–45)
Raw mackerel ×30–40 (noted) (1/7.111), Raw pike ×20–30 (noted) (1/7.901), Raw salmon ×10–20 (noted) (1/8.889), Raw tuna ×7–12 (noted) (1/10.16), Raw lobster ×5–10 (noted) (1/11.85)
Fish (Levels 46–49)
Raw pike ×30–40 (noted) (1/7.111), Raw salmon ×20–30 (noted) (1/7.901), Raw tuna ×10–20 (noted) (1/8.889), Raw lobster ×7–12 (noted) (1/10.16), Raw bass ×5–10 (noted) (1/11.85)
Fish (Levels 50–75)
Raw salmon ×30–40 (noted) (1/7.111), Raw tuna ×20–30 (noted) (1/7.901), Raw lobster ×10–20 (noted) (1/8.889), Raw bass ×7–12 (noted) (1/10.16), Raw swordfish ×5–10 (noted) (1/11.85)
Fish (Levels 76–78)
Raw tuna ×30–40 (noted) (1/7.111), Raw lobster ×20–30 (noted) (1/7.901), Raw bass ×10–20 (noted) (1/8.889), Raw swordfish ×7–12 (noted) (1/10.16), Raw shark ×5–10 (noted) (1/11.85)
Fish (Levels 79–80)
Raw lobster ×30–40 (noted) (1/7.111), Raw bass ×20–30 (noted) (1/7.901), Raw swordfish ×10–20 (noted) (1/8.889), Raw shark ×7–12 (noted) (1/10.16), Raw sea turtle ×5–10 (noted) (1/11.85)
Fish (Levels 81+)
Raw bass ×30–40 (noted) (1/7.111), Raw swordfish ×20–30 (noted) (1/7.901), Raw shark ×10–20 (noted) (1/8.889), Raw sea turtle ×7–12 (noted) (1/10.16), Raw manta ray ×5–10 (noted) (1/11.85)
Other
Plank ×20–30 (noted) (1/22.86), Oak plank ×15–25 (noted) (1/32), Seaweed ×20–60 (noted) (1/40), Steel nails ×300–500 (1/80), Feather ×800–1,600 (1/80), Fishing bait ×800–1,600 (1/80)
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